Document:

Exhibit 4.3

 

COMMON
SHARE PURCHASE WARRANT

 

Mechanical
Technology, Incorporated

 

	Warrant Shares: [ ]	Initial Exercise Date: April [ ], 2021

 

THIS
COMMON SHARE PURCHASE WARRANT (the “Warrant”) certifies that, for value received, [ ] or its assigns (the “Holder”)
is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on
or after the date hereof (the “Initial Exercise Date”) and on or prior to 5:00 p.m. (New York City time) on
April [ ], 2026 (the “Termination Date”) but not thereafter, to subscribe for and purchase from Mechanical
Technology, Incorporated, a company organized under the laws of the state of Nevada (the “Company”), up to
[ ] Common Shares (as subject to adjustment hereunder, the “Warrant Shares”). The purchase price of one Warrant
Share under this Warrant shall be equal to the Exercise Price, as defined in Section 2(b).

 

Section
1.            Definitions. In addition to the terms defined elsewhere in this Warrant, the following terms have the meanings
indicated in this Section 1:

 

“Affiliate”
means any Person that, directly or indirectly through one or more intermediaries, controls or is controlled by or is under common
control with a Person, as such terms are used in and construed under Rule 405 under the Securities Act.

 

“Bid
Price” means, for any date, the price determined by the first of the following clauses that applies: (a) if the Common
Shares are then listed or quoted on a Trading Market, the bid price of the Common Shares for the time in question (or the nearest
preceding date) on the Trading Market on which the Common Shares are then listed or quoted as reported by Bloomberg L.P. (based
on a Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m. (New York City time)), (b) if OTCQB or OTCQX is not a Trading
Market, the volume weighted average price of the Common Shares for such date (or the nearest preceding date) on OTCQB or OTCQX
as applicable, (c) if the Common Shares are not then listed or quoted for trading on OTCQB or OTCQX and if prices for the Common
Shares are then reported on the Pink Open Market (or a similar organization or agency succeeding to its functions of reporting
prices), the most recent bid price per Common Share so reported, or (d) in all other cases, the fair market value of an Common
Share as determined by an independent appraiser selected in good faith by the Holders of a majority in interest of the Warrants
then outstanding and reasonably acceptable to the Company, the fees and expenses of which shall be paid by the Company.

 

“Board
of Directors” means the board of directors of the Company.

 

“Business
Day” means any day other than Saturday, Sunday or other day on which commercial banks in The City of New York are authorized
or required by law to remain closed; provided, however, for clarification, commercial banks shall not be deemed
to be authorized or required by law to remain closed due to “stay at home”, “shelter-in-place”, “non-essential
employee” or any other similar orders or restrictions or the closure of any physical branch locations at the direction of
any governmental authority so long as the electronic funds transfer systems (including for wire transfers) of commercial banks
in The City of New York generally are open for use by customers on such day.

 

     1

     

    

 

“Commission”
means the United States Securities and Exchange Commission.

 

“Common
Share(s)” means shares of the Company’s common stock, par value $0.001 per share, and any other class of securities
into which such securities may hereafter be reclassified or changed.

 

“Common
Share Equivalents” means any securities of the Company or the Subsidiaries which would entitle the holder thereof to
acquire at any time Common Shares, including, without limitation, any debt, preferred shares, right, option, warrant or other
instrument that is at any time convertible into or exercisable or exchangeable for, or otherwise entitles the holder thereof to
receive, Common Shares.

 

“Exchange
Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.

 

“Person”
means an individual or corporation, partnership, trust, incorporated or unincorporated association, joint venture, limited liability
company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind.

 

“Registration
Statement” means the Company’s registration statement on Form S-1 (File No. 333-254064).

 

“Securities
Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.

 

“Subsidiary”
means any subsidiary of the Company and shall, where applicable, also include any direct or indirect subsidiary of the Company
formed or acquired after the date hereof.

 

“Trading
Day” means a day on which the Common Shares are traded on a Trading Market.

 

“Trading
Market” means any of the following markets or exchanges on which the Common Shares are listed or quoted for trading
on the date in question: the NYSE American, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market
or the New York Stock Exchange (or any successors to any of the foregoing).

 

“Transfer
Agent” means American Stock Transfer & Trust Company, LLC, the current transfer agent of the Company, with a mailing
address of [ ], and any successor transfer agent of the Company.

 

“VWAP”
means, for any date, the price determined by the first of the following clauses that applies: (a) if the Common Shares are then
listed or quoted on a Trading Market, the daily volume weighted average price of an Common Shares for such date (or the nearest
preceding date) on the Trading Market on which an Common Shares is then listed or quoted as reported by Bloomberg L.P. (based
on a Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m. (New York City time)), (b) if the OTCQB or OTCQX is not a Trading
Market, the volume weighted average price of an Common Shares for such date (or the nearest preceding date) on the OTCQB or OTCQX,
(c) if Common Shares s are not then listed or quoted for trading on the OTCQB or OTCQX and if prices for Common Shares are then
reported in the “Pink Sheets” published by OTC Markets Group, Inc. (or a similar organization or agency succeeding
to its functions of reporting prices), the most recent bid price per share of an Common Shares so reported, or (d) in all other
cases, the fair market value of an Common Shares as determined by an independent appraiser selected in good faith by the Purchasers
of a majority in interest of the Securities then outstanding and reasonably acceptable to the Company, the fees and expenses of
which shall be paid by the Company.

     2

     

    

 

“Warrants”
means this Warrant and other Common Share purchase warrants issued by the Company pursuant to the Securities Purchase Agreement,
dated as of even date herewith, between the Company, the Holder and the other purchasers that are parties thereto.

 

Section
2.          Exercise.

 

a)         Exercise of Warrant. Exercise of the purchase rights represented by this Warrant may be made, in whole or in part, at any
time or times on or after the Initial Exercise Date and on or before the Termination Date by delivery to the Company of a duly
executed facsimile copy or PDF copy submitted by e-mail (or e-mail attachment) of the Notice of Exercise in the form annexed hereto
(the “Notice of Exercise”). Within the earlier of (i) two (2) Trading Days and (ii) the number of Trading Days
comprising the Standard Settlement Period (as defined in Section 2(d)(i) herein) following the date of exercise as aforesaid,
the Holder shall deliver the aggregate Exercise Price for the shares specified in the applicable Notice of Exercise by wire transfer
of immediate available funds to the bank account as designated by the Company unless the cashless exercise procedure specified
in Section 2(c) below is specified in the applicable Notice of Exercise. No ink-original Notice of Exercise shall be required,
nor shall any medallion guarantee (or other type of guarantee or notarization) of any Notice of Exercise be required. Notwithstanding
anything herein to the contrary, the Holder shall not be required to physically surrender this Warrant to the Company until the
Holder has purchased all of the Warrant Shares available hereunder and the Warrant has been exercised in full, in which case,
the Holder shall surrender this Warrant to the Company for cancellation within three (3) Trading Days of the date on which the
final Notice of Exercise is delivered to the Company. Partial exercises of this Warrant resulting in purchases of a portion of
the total number of Warrant Shares available hereunder shall have the effect of lowering the outstanding number of Warrant Shares
purchasable hereunder in an amount equal to the applicable number of Warrant Shares purchased. The Holder and the Company shall
maintain records showing the number of Warrant Shares purchased and the date of such purchases. The Company shall deliver any
objection to any Notice of Exercise within one (1) Business Day of receipt of such notice. The Holder and any assignee, by
acceptance of this Warrant, acknowledge and agree that, by reason of the provisions of this paragraph, following the purchase
of a portion of the Warrant Shares hereunder, the number of Warrant Shares available for purchase hereunder at any given time
may be less than the amount stated on the face hereof.

 

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b)         Exercise Price. The exercise price per Common Share under this Warrant shall be $[ ], subject to adjustment hereunder (the
“Exercise Price”).

 

c)         Cashless Exercise. If at the time of exercise hereof there is no effective registration statement registering, or the prospectus
contained therein is not available for the issuance of the Warrant Shares to the Holder, then this Warrant may also be exercised,
in whole or in part, at such time by means of a “cashless exercise” in which the Holder shall be entitled to receive
a number of Warrant Shares equal to the quotient obtained by dividing [(A-B)(X)] by (A), where:

 

(A)
=  as elected by the Holder: (i) the VWAP on the Trading Day immediately preceding the date of the applicable Notice of Exercise,
if such Notice of Exercise is (1) both executed and delivered pursuant to Section 2(a) hereof on a day that is not a Trading Day
or (2) both executed and delivered pursuant to Section 2(a) hereof on a Trading Day prior to the opening of “regular trading
hours” (as defined in Rule 600(b)(68) of Regulation NMS promulgated under the federal securities laws) on such Trading Day,
(ii) at the option of the Holder, either (y) the VWAP on the Trading Day immediately preceding the date of the applicable Notice
of Exercise or (z) the Bid Price of the Common Shares on the principal Trading Market as reported by Bloomberg L.P. as of the
time of the Holder’s execution of the applicable Notice of Exercise if such Notice of Exercise is executed during “regular
trading hours” on a Trading Day and is delivered within two (2) hours thereafter (including until two (2) hours after the
close of “regular trading hours” on a Trading Day) pursuant to Section 2(a) hereof or (iii) the VWAP on the date of
the applicable Notice of Exercise if the date of such Notice of Exercise is a Trading Day and such Notice of Exercise is both
executed and delivered pursuant to Section 2(a) hereof after the close of “regular trading hours” on such Trading
Day;

 

(B)
=   the Exercise Price of this Warrant, as adjusted hereunder; and

 

(X)
=   the number of Warrant Shares that would be issuable upon exercise of this Warrant in accordance with the terms of this Warrant
if such exercise were by means of a cash exercise rather than a cashless exercise.

 

If
Warrant Shares are issued in such a cashless exercise, the parties acknowledge and agree that in accordance with Section 3(a)(9)
of the Securities Act, the Warrant Shares shall take on the registered characteristics of the Warrants being exercised. The Company
agrees not to take any position contrary to this Section 2(c).

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Notwithstanding
anything herein to the contrary, on the Termination Date, this Warrant shall be automatically exercised via cashless exercise
pursuant to this Section 2(c).

 

		d)	Mechanics
                                         of Exercise.

 

		i.	Delivery
                                         of Warrant Shares Upon Exercise. The Company shall cause the Warrant Shares purchased
                                         hereunder to be transmitted by the Transfer Agent to the Holder by crediting the account
                                         of the Holder’s or its designee’s balance account with The Depository Trust
                                         Company through its Deposit or Withdrawal at Custodian system (“DWAC”)
                                         if the Company is then a participant in such system and either (A) there is an effective
                                         registration statement permitting the issuance of the Warrant Shares to or resale of
                                         the Warrant Shares by Holder or (B) this Warrant is being exercised via cashless exercise,
                                         and otherwise by physical delivery of a certificate, registered in the Company’s
                                         share register in the name of the Holder or its designee, for the number of Warrant Shares
                                         to which the Holder is entitled pursuant to such exercise to the address specified by
                                         the Holder in the Notice of Exercise by the date that is the earliest of (i) two (2)
                                         Trading Days after the delivery to the Company of the Notice of Exercise, (ii) one (1)
                                         Trading Day after delivery of the aggregate Exercise Price to the Company and (iii) the
                                         number of Trading Days comprising the Standard Settlement Period after the delivery to
                                         the Company of the Notice of Exercise (such date, the “Warrant Share Delivery
                                         Date”). Upon delivery of the Notice of Exercise, the Holder shall be deemed
                                         for all corporate purposes to have become the holder of record of the Warrant Shares
                                         with respect to which this Warrant has been exercised, irrespective of the date of delivery
                                         of the Warrant Shares, provided that payment of the aggregate Exercise Price (other than
                                         in the case of a cashless exercise) is received within the earlier of (i) two (2) Trading
                                         Days and (ii) the number of Trading Days comprising the Standard Settlement Period following
                                         delivery of the Notice of Exercise. If the Company fails for any reason to deliver to
                                         the Holder the Warrant Shares subject to a Notice of Exercise by the Warrant Share Delivery
                                         Date, the Company shall pay to the Holder, in cash, as liquidated damages and not as
                                         a penalty, for each $1,000 of Warrant Shares subject to such exercise (based on the VWAP
                                         of the Common Shares on the date of the applicable Notice of Exercise), $10 per Trading
                                         Day (increasing to $20 per Trading Day on the fifth Trading Day after such liquidated
                                         damages begin to accrue) for each Trading Day after such Warrant Share Delivery Date
                                         until such Warrant Shares are delivered or Holder rescinds such exercise. The Company
                                         agrees to maintain a transfer agent that is a participant in the FAST program so long
                                         as this Warrant remains outstanding and exercisable. As used herein, “Standard
                                         Settlement Period” means the standard settlement period, expressed in a number
                                         of Trading Days, on the Company’s primary Trading Market with respect to the Common
                                         Shares as in effect on the date of delivery of the Notice of Exercise. Notwithstanding
                                         the foregoing, with respect to any Notice(s) of Exercise delivered on or prior to 12:00
                                         p.m. (New York City time) on the Initial Exercise Date, which may be delivered at any
                                         time after April 6, 2021 the Company agrees to deliver the Warrant Shares subject to
                                         such notice(s) by 4:00 p.m. (New York City time) on the Initial Exercise Date and the
                                         Initial Exercise Date shall be the Warrant Share Delivery Date for purposes hereunder.

 

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ii.       Delivery of New Warrants Upon Exercise. If this Warrant shall have been exercised in part, the Company shall, at the request
of a Holder and upon surrender of this Warrant certificate, at the time of delivery of the Warrant Shares, deliver to the Holder
a new Warrant evidencing the rights of the Holder to purchase the unpurchased Warrant Shares called for by this Warrant, which
new Warrant shall in all other respects be identical with this Warrant.

 

iii.      Rescission Rights. If the Company fails to cause the Transfer Agent to transmit to the Holder the Warrant Shares pursuant
to Section 2(d)(i) by the Warrant Share Delivery Date, then the Holder will have the right to rescind such exercise.

 

iv.      Compensation for Buy-In on Failure to Timely Deliver Warrant Shares Upon Exercise. In addition to any other rights available
to the Holder, if the Company fails to cause the Transfer Agent to transmit to the Holder the Warrant Shares in accordance with
the provisions of Section 2(d)(i) above pursuant to an exercise on or before the Warrant Share Delivery Date, and if after such
date the Holder is required by its broker to purchase (in an open market transaction or otherwise) or the Holder’s brokerage
firm otherwise purchases, Common Shares to deliver in satisfaction of a sale by the Holder of the Warrant Shares which the Holder
anticipated receiving upon such exercise (a “Buy-In”), then the Company shall (A) pay in cash to the Holder
the amount, if any, by which (x) the Holder’s total purchase price (including brokerage commissions, if any) for the Common
Shares so purchased exceeds (y) the amount obtained by multiplying (1) the number of Warrant Shares that the Company was required
to deliver to the Holder in connection with the exercise at issue times (2) the price at which the sell order giving rise to such
purchase obligation was executed, and (B) at the option of the Holder, either reinstate the portion of the Warrant and equivalent
number of Warrant Shares for which such exercise was not honored (in which case such exercise shall be deemed rescinded) or deliver
to the Holder the number of Common Shares that would have been issued had the Company timely complied with its exercise and delivery
obligations hereunder. For example, if the Holder purchases Common Shares having a total purchase price of $11,000 to cover a
Buy-In with respect to an attempted exercise of Common Shares with an aggregate sale price giving rise to such purchase obligation
of $10,000, under clause (A) of the immediately preceding sentence the Company shall be required to pay the Holder $1,000. The
Holder shall provide the Company written notice indicating the amounts payable to the Holder in respect of the Buy-In and, upon
request of the Company, evidence of the amount of such loss. Nothing herein shall limit a Holder’s right to pursue any other
remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or
injunctive relief with respect to the Company’s failure to timely deliver Common Shares upon exercise of the Warrant as
required pursuant to the terms hereof.

 

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v.       No Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise
of this Warrant. As to any fraction of a share which the Holder would otherwise be entitled to purchase upon such exercise, the
Company shall, at its election, either pay a cash adjustment in respect of such final fraction in an amount equal to such fraction
multiplied by the Exercise Price or round up to the next whole share.

 

vi.      Charges, Taxes and Expenses. Issuance of Warrant Shares shall be made without charge to the Holder for any issue or transfer
tax or other incidental expense in respect of the issuance of such Warrant Shares, all of which taxes and expenses shall be paid
by the Company, and such Warrant Shares shall be issued in the name of the Holder or in such name or names as may be directed
by the Holder; provided, however, that, in the event that Warrant Shares are to be issued in a name other than the
name of the Holder, this Warrant when surrendered for exercise shall be accompanied by the Assignment Form attached hereto duly
executed by the Holder and the Company may require, as a condition thereto, the payment of a sum sufficient to reimburse it for
any transfer tax incidental thereto. The Company shall pay all Transfer Agent fees required for same-day processing of any Notice
of Exercise and all fees to the Depository Trust Company (or another established clearing corporation performing similar functions)
required for same-day electronic delivery of the Warrant Shares.

 

vii.     Closing of Books. The Company will not close its shareholder books or records in any manner which prevents the timely exercise
of this Warrant, pursuant to the terms hereof.

 

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e)             Holder’s Exercise Limitations. The Company shall not effect any exercise of this Warrant, and a Holder shall not
have the right to exercise any portion of this Warrant, pursuant to Section 2 or otherwise, to the extent that after giving effect
to such issuance after exercise as set forth on the applicable Notice of Exercise, the Holder (together with the Holder’s
Affiliates, and any other Persons acting as a group together with the Holder or any of the Holder’s Affiliates (such Persons,
“Attribution Parties”)), would beneficially own in excess of the Beneficial Ownership Limitation (as defined
below). For purposes of the foregoing sentence, the number of Common Shares beneficially owned by the Holder and its Affiliates
and Attribution Parties shall include the number of Common Shares issuable upon exercise of this Warrant with respect to which
such determination is being made, but shall exclude the number of Common Shares which would be issuable upon (i) exercise of the
remaining, nonexercised portion of this Warrant beneficially owned by the Holder or any of its Affiliates or Attribution Parties
and (ii) exercise or conversion of the unexercised or nonconverted portion of any other securities of the Company (including,
without limitation, any other Common Share Equivalents) subject to a limitation on conversion or exercise analogous to the limitation
contained herein beneficially owned by the Holder or any of its Affiliates or Attribution Parties. Except as set forth in the
preceding sentence, for purposes of this Section 2(e), beneficial ownership shall be calculated in accordance with Section 13(d)
of the Exchange Act and the rules and regulations promulgated thereunder, it being acknowledged by the Holder that the Company
is not representing to the Holder that such calculation is in compliance with Section 13(d) of the Exchange Act and the Holder
is solely responsible for any schedules required to be filed in accordance therewith. To the extent that the limitation contained
in this Section 2(e) applies, the determination of whether this Warrant is exercisable (in relation to other securities owned
by the Holder together with any Affiliates and Attribution Parties) and of which portion of this Warrant is exercisable shall
be in the sole discretion of the Holder, and the submission of a Notice of Exercise shall be deemed to be the Holder’s determination
of whether this Warrant is exercisable (in relation to other securities owned by the Holder together with any Affiliates and Attribution
Parties) and of which portion of this Warrant is exercisable, in each case subject to the Beneficial Ownership Limitation, and
the Company shall have no obligation to verify or confirm the accuracy of such determination. In addition, a determination as
to any group status as contemplated above shall be determined in accordance with Section 13(d) of the Exchange Act and the rules
and regulations promulgated thereunder. For purposes of this Section 2(e), in determining the number of outstanding Common Shares,
a Holder may rely on the number of outstanding Common Shares as reflected in (A) the Company’s most recent periodic or annual
report filed with the Commission, as the case may be, (B) a more recent public announcement by the Company or (C) a more recent
written notice by the Company or the Transfer Agent setting forth the number of Common Shares outstanding. Upon the written or
oral request of a Holder, the Company shall within one Trading Day confirm orally and in writing to the Holder the number of Common
Shares then outstanding. In any case, the number of outstanding Common Shares shall be determined after giving effect to the conversion
or exercise of securities of the Company, including this Warrant, by the Holder or its Affiliates or Attribution Parties since
the date as of which such number of outstanding Common Shares was reported. The “Beneficial Ownership Limitation”
shall be 4.99% (or, upon election by a Holder prior to the issuance of any Warrants, 9.99%) of the number of Common Shares outstanding
immediately after giving effect to the issuance of Common Shares issuable upon exercise of this Warrant. The Holder, upon notice
to the Company, may increase or decrease the Beneficial Ownership Limitation provisions of this Section 2(e), provided that the
Beneficial Ownership Limitation in no event exceeds 9.99% of the number of Common Shares outstanding immediately after giving
effect to the issuance of Common Shares upon exercise of this Warrant held by the Holder and the provisions of this Section 2(e)
shall continue to apply. Any increase in the Beneficial Ownership Limitation will not be effective until the 61st day
after such notice is delivered to the Company. The provisions of this paragraph shall be construed and implemented in a manner
otherwise than in strict conformity with the terms of this Section 2(e) to correct this paragraph (or any portion hereof) which
may be defective or inconsistent with the intended Beneficial Ownership Limitation herein contained or to make changes or supplements
necessary or desirable to properly give effect to such limitation. The limitations contained in this paragraph shall apply to
a successor holder of this Warrant.

 

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Section
3.              Certain Adjustments.

 

a)            Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding: (i) pays a stock dividend or
otherwise makes a distribution or distributions on Common Shares or any other equity or equity equivalent securities payable in
Common Shares (which, for avoidance of doubt, shall not include any Common Shares issued by the Company upon exercise of this
Warrant), (ii) subdivides outstanding Common Shares into a larger number of shares, (iii) combines (including by way of reverse
stock split) outstanding Common Shares into a smaller number of shares, or (iv) issues by reclassification of Common Shares any
shares of capital stock of the Company, then in each case the Exercise Price shall be multiplied by a fraction of which the numerator
shall be the number of Common Shares (excluding treasury shares, if any) outstanding immediately before such event and of which
the denominator shall be the number of Common Shares outstanding immediately after such event, and the number of shares issuable
upon exercise of this Warrant shall be proportionately adjusted such that the aggregate Exercise Price of this Warrant shall remain
unchanged. Any adjustment made pursuant to this Section 3(a) shall become effective immediately after the record date for the
determination of shareholders entitled to receive such dividend or distribution and shall become effective immediately after the
effective date in the case of a subdivision, combination or re-classification.

 

b)            Subsequent Rights Offerings. In addition to any adjustments pursuant to Section 3(a) above, if at any time the Company
grants, issues or sells any Common Share Equivalents or rights to purchase stock, warrants, securities or other property pro rata
to the record holders of any class of Common Shares (the “Purchase Rights”), then the Holder will be entitled
to acquire, upon the terms applicable to such Purchase Rights, the aggregate Purchase Rights which the Holder could have acquired
if the Holder had held the number of Common Shares acquirable upon complete exercise of this Warrant (without regard to any limitations
on exercise hereof, including without limitation, the Beneficial Ownership Limitation) immediately before the date on which a
record is taken for the grant, issuance or sale of such Purchase Rights, or, if no such record is taken, the date as of which
the record holders of Common Shares are to be determined for the grant, issue or sale of such Purchase Rights (provided, however,
that, to the extent that the Holder’s right to participate in any such Purchase Right would result in the Holder exceeding
the Beneficial Ownership Limitation, then the Holder shall not be entitled to participate in such Purchase Right to such extent
(or beneficial ownership of such Common Shares as a result of such Purchase Right to such extent) and such Purchase Right to such
extent shall be held in abeyance for the Holder until such time, if ever, as its right thereto would not result in the Holder
exceeding the Beneficial Ownership Limitation).

 

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c)            Pro Rata Distributions. During such time as this Warrant is outstanding, if the Company shall declare or make any dividend
or other distribution of its assets (or rights to acquire its assets) to holders of Common Shares, by way of return of capital
or otherwise (including, without limitation, any distribution of cash, stock or other securities, property or options by way of
a dividend, spin off, reclassification, corporate rearrangement, scheme of arrangement or other similar transaction) (a “Distribution”),
at any time after the issuance of this Warrant, then, in each such case, the Holder shall be entitled to participate in such Distribution
to the same extent that the Holder would have participated therein if the Holder had held the number of Common Shares acquirable
upon complete exercise of this Warrant (without regard to any limitations on exercise hereof, including without limitation, the
Beneficial Ownership Limitation) immediately before the date of which a record is taken for such Distribution, or, if no such
record is taken, the date as of which the record holders of Common Shares are to be determined for the participation in such Distribution
(provided, however, that, to the extent that the Holder's right to participate in any such Distribution would result
in the Holder exceeding the Beneficial Ownership Limitation, then the Holder shall not be entitled to participate in such Distribution
to such extent (or in the beneficial ownership of any Common Shares as a result of such Distribution to such extent) and the portion
of such Distribution shall be held in abeyance for the benefit of the Holder until such time, if ever, as its right thereto would
not result in the Holder exceeding the Beneficial Ownership Limitation).

 

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d)            Fundamental Transaction. If, at any time while this Warrant is outstanding, (i) the Company, directly or indirectly, in
one or more related transactions effects any merger or consolidation of the Company with or into another Person, (ii) the Company
directly or indirectly, effects any sale, lease, license, assignment, transfer, conveyance or other disposition of all or substantially
all of its assets in one or a series of related transactions, (iii) any, direct or indirect, purchase offer, tender offer or exchange
offer (whether by the Company or another Person) is completed pursuant to which holders of Common Shares are permitted to sell,
tender or exchange their shares for other securities, cash or property and has been accepted by the holders of 50% or more of
the outstanding Common Shares, (iv) the Company, directly or indirectly, in one or more related transactions effects any reclassification,
reorganization or recapitalization of the Common Shares or any compulsory share exchange pursuant to which the Common Shares are
effectively converted into or exchanged for other securities, cash or property, or (v) the Company, directly or indirectly, in
one or more related transactions consummates a stock or share purchase agreement or other business combination (including, without
limitation, a reorganization, recapitalization, spin-off, merger or scheme of arrangement) with another Person or group of Persons
whereby such other Person or group acquires more than 50% of the outstanding Common Shares (not including any Common Shares held
by the other Person or other Persons making or party to, or associated or affiliated with the other Persons making or party to,
such stock or share purchase agreement or other business combination) (each a “Fundamental Transaction”), then,
upon any subsequent exercise of this Warrant, the Holder shall have the right to receive, for each Warrant Share that would have
been issuable upon such exercise immediately prior to the occurrence of such Fundamental Transaction, at the option of the Holder
(without regard to any limitation in Section 2(e) on the exercise of this Warrant), the number of Common Shares of the successor
or acquiring corporation or of the Company, if it is the surviving corporation, and any additional consideration (the “Alternate
Consideration”) receivable as a result of such Fundamental Transaction by a holder of the number of Common Shares for
which this Warrant is exercisable immediately prior to such Fundamental Transaction (without regard to any limitation in Section
2(e) on the exercise of this Warrant). For purposes of any such exercise, the determination of the Exercise Price shall be appropriately
adjusted to apply to such Alternate Consideration based on the amount of Alternate Consideration issuable in respect of one Common
Share in such Fundamental Transaction, and the Company shall apportion the Exercise Price among the Alternate Consideration in
a reasonable manner reflecting the relative value of any different components of the Alternate Consideration. If holders of Common
Shares are given any choice as to the securities, cash or property to be received in a Fundamental Transaction, then the Holder
shall be given the same choice as to the Alternate Consideration it receives upon any exercise of this Warrant following such
Fundamental Transaction. Notwithstanding anything to the contrary, in the event of a Fundamental Transaction, the Company or any
Successor Entity (as defined below) shall, at the Holder’s option, exercisable at any time concurrently with, or within
30 days after, the consummation of the Fundamental Transaction (or, if later, the date of the public announcement of the applicable
Fundamental Transaction), purchase this Warrant from the Holder by paying to the Holder an amount of cash equal to the Black Scholes
Value (as defined below) of the remaining unexercised portion of this Warrant on the date of the consummation of such Fundamental
Transaction; provided, however, that, if the Fundamental Transaction is not within the Company's control, including
not approved by the Company's Board of Directors, Holder shall only be entitled to receive from the Company or any Successor Entity
the same type or form of consideration (and in the same proportion), at the Black Scholes Value of the unexercised portion of
this Warrant, that is being offered and paid to the holders of Common Shares of the Company in connection with the Fundamental
Transaction, whether that consideration be in the form of cash, stock or any combination thereof, or whether the holders of Common
Shares are given the choice to receive from among alternative forms of consideration in connection with the Fundamental Transaction;
provided, further, that if holders of Common Shares of the Company are not offered or paid any consideration in
such Fundamental Transaction, such holders of Common Shares will be deemed to have received Common Shares of the Successor Entity
(which Entity may be the Company following such Fundamental Transaction) in such Fundamental Transaction. “Black Scholes
Value” means the value of this Warrant based on the Black-Scholes Option Pricing Model obtained from the “OV”
function on Bloomberg, L.P. (“Bloomberg”) determined as of the day of consummation of the applicable Fundamental
Transaction for pricing purposes and reflecting (A) a risk-free interest rate corresponding to the U.S. Treasury rate for a period
equal to the time between the date of the public announcement of the applicable Fundamental Transaction and the Termination Date,
(B) an expected volatility equal to the greater of 100% and the 100 day volatility obtained from the HVT function on Bloomberg
(determined utilizing a 365 day annualization factor) as of the Trading Day immediately following the public announcement of the
applicable Fundamental Transaction, (C) the underlying price per share used in such calculation shall be the greater of (i) the
sum of the price per share being offered in cash, if any, plus the value of any non-cash consideration, if any, being offered
in such Fundamental Transaction and (ii) the greater of (x) the last VWAP immediately prior to the public announcement of such
Fundamental Transaction and (y) the last VWAP immediately prior to the consummation of such Fundamental Transaction and (D) a
remaining option time equal to the time between the date of the public announcement of the applicable Fundamental Transaction
and the Termination Date, and (E) a zero cost of borrow. The payment of the Black Scholes Value will be made by wire transfer
of immediately available funds (or such other consideration) within five Business Days of the Holder’s election (or, if
later, on the date of consummation of the Fundamental Transaction). The Company shall cause any successor entity in a Fundamental
Transaction in which the Company is not the survivor (the “Successor Entity”) to assume in writing all of the
obligations of the Company under this Warrant in accordance with the provisions of this Section 3(e) pursuant to written agreements
in form and substance reasonably satisfactory to the Holder and approved by the Holder (without unreasonable delay) prior to such
Fundamental Transaction and shall, at the option of the Holder, deliver to the Holder in exchange for this Warrant a security
of the Successor Entity evidenced by a written instrument substantially similar in form and substance to this Warrant which is
exercisable for a corresponding number of shares of capital stock of such Successor Entity (or its parent entity) equivalent to
the Common Shares acquirable and receivable upon exercise of this Warrant (without regard to any limitations on the exercise of
this Warrant) prior to such Fundamental Transaction, and with an exercise price which applies the exercise price hereunder to
such shares of capital stock (but taking into account the relative value of the Common Shares pursuant to such Fundamental Transaction
and the value of such shares of capital stock, such number of shares of capital stock and such exercise price being for the purpose
of protecting the economic value of this Warrant immediately prior to the consummation of such Fundamental Transaction), and which
is reasonably satisfactory in form and substance to the Holder. Upon the occurrence of any such Fundamental Transaction, the Successor
Entity shall succeed to, and be substituted for (so that from and after the date of such Fundamental Transaction, the provisions
of this Warrant referring to the “Company” shall refer instead to the Successor Entity), and may exercise every right
and power of the Company and shall assume all of the obligations of the Company under this Warrant with the same effect as if
such Successor Entity had been named as the Company herein.

 

     11

     

    

 

e)            Calculations. All calculations under this Section 3 shall be made to the nearest cent or the nearest 1/100th of a share,
as the case may be. For purposes of this Section 3, the number of Common Shares deemed to be issued and outstanding as of a given
date shall be the sum of the number of Common Shares (excluding treasury shares, if any) issued and outstanding.

 

f)             Notice to Holder.

 

i.           
Adjustment to Exercise Price. Whenever the Exercise Price is adjusted pursuant to any provision of this Section 3, the
Company shall promptly deliver to the Holder by facsimile or email a notice setting forth the Exercise Price after such adjustment
and any resulting adjustment to the number of Warrant Shares and setting forth a brief statement of the facts requiring such adjustment.

 

     12

     

    

 

ii.           
Notice to Allow Exercise by Holder. If (A) the Company shall declare a dividend (or any other distribution in whatever
form) on the Common Shares, (B) the Company shall declare a special nonrecurring cash dividend on or a redemption of the Common
Shares, (C) the Company shall authorize the granting to all holders of the Common Shares rights or warrants to subscribe for or
purchase any shares of capital stock of any class or of any rights, (D) the approval of any shareholders of the Company shall
be required in connection with any reclassification of the Common Shares, any consolidation or merger to which the Company (or
any of its Subsidiaries) is a party, any sale or transfer of all or substantially all of its assets, or any compulsory share exchange
whereby the Common Shares are converted into other securities, cash or property, or (E) the Company shall authorize the voluntary
or involuntary dissolution, liquidation or winding up of the affairs of the Company, then, in each case, the Company shall cause
to be delivered by facsimile or email to the Holder at its last facsimile number or email address as it shall appear upon the
Warrant Register of the Company, at least twenty (20) calendar days prior to the applicable record or effective date hereinafter
specified, a notice stating (x) the date on which a record is to be taken for the purpose of such dividend, distribution, redemption,
rights or warrants, or if a record is not to be taken, the date as of which the holders of the Common Shares of record to be entitled
to such dividend, distributions, redemption, rights or warrants are to be determined or (y) the date on which such reclassification,
consolidation, merger, sale, transfer or share exchange is expected to become effective or close, and the date as of which it
is expected that holders of the Common Shares of record shall be entitled to exchange their Common Shares for securities, cash
or other property deliverable upon such reclassification, consolidation, merger, sale, transfer or share exchange; provided that
the failure to deliver such notice or any defect therein or in the delivery thereof shall not affect the validity of the corporate
action required to be specified in such notice. To the extent that any notice provided in this Warrant constitutes, or contains,
material, non-public information regarding the Company or any of the Subsidiaries, the Company shall simultaneously file such
notice with the Commission pursuant to a Current Report on Form 8-K. The Holder shall remain entitled to exercise this Warrant
during the period commencing on the date of such notice to the effective date of the event triggering such notice except as may
otherwise be expressly set forth herein.

 

g)            Voluntary Adjustment By Company. Subject to the rules and regulations of the Trading Market, the Company may at any time
during the term of this Warrant, subject to the prior written consent of the Holder, reduce the then current Exercise Price to
any amount and for any period of time deemed appropriate by the board of directors of the Company.

 

     13

     

    

 

Section
4.             Transfer of Warrant.

 

a)            Transferability. This Warrant and all rights hereunder (including, without limitation, any registration rights) are transferable,
in whole or in part, upon surrender of this Warrant at the principal office of the Company or its designated agent, together with
a written assignment of this Warrant substantially in the form attached hereto duly executed by the Holder or its agent or attorney
and funds sufficient to pay any transfer taxes payable upon the making of such transfer. Upon such surrender and, if required,
such payment, the Company shall execute and deliver a new Warrant or Warrants in the name of the assignee or assignees, as applicable,
and in the denomination or denominations specified in such instrument of assignment, and shall issue to the assignor a new Warrant
evidencing the portion of this Warrant not so assigned, and this Warrant shall promptly be cancelled. Notwithstanding anything
herein to the contrary, the Holder shall not be required to physically surrender this Warrant to the Company unless the Holder
has assigned this Warrant in full, in which case, the Holder shall surrender this Warrant to the Company within three (3) Trading
Days of the date on which the Holder delivers an assignment form to the Company assigning this Warrant in full. The Warrant, if
properly assigned in accordance herewith, may be exercised by a new holder for the purchase of Warrant Shares without having a
new Warrant issued.

 

b)            New Warrants. This Warrant may be divided or combined with other Warrants upon presentation hereof at the aforesaid office
of the Company, together with a written notice specifying the names and denominations in which new Warrants are to be issued,
signed by the Holder or its agent or attorney. Subject to compliance with Section 4(a), as to any transfer which may be involved
in such division or combination, the Company shall execute and deliver a new Warrant or Warrants in exchange for the Warrant or
Warrants to be divided or combined in accordance with such notice. All Warrants issued on transfers or exchanges shall be dated
the initial issuance date of this Warrant and shall be identical with this Warrant except as to the number of Warrant Shares issuable
pursuant thereto.

 

c)            Warrant Register. The Company shall register this Warrant, upon records to be maintained by the Company for that purpose
(the “Warrant Register”), in the name of the record Holder hereof from time to time. The Company may deem and
treat the registered Holder of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or any distribution
to the Holder, and for all other purposes, absent actual notice to the contrary.

 

Section
5.              Miscellaneous.

 

a)            No Rights as Shareholder Until Exercise; No Settlement in Cash. This Warrant does not entitle the Holder to any voting
rights, dividends or other rights as a shareholder of the Company prior to the exercise hereof as set forth in Section 2(d)(i),
except as expressly set forth in Section 3. Without limiting any rights of a Holder to receive Warrant Shares on a “cashless
exercise” pursuant to Section 2(c) or to receive cash payments pursuant to Section 2(d)(i) and Section 2(d)(iv) herein,
in no event shall the Company be required to net cash settle an exercise of this Warrant.

 

     14

     

    

 

b)            Loss, Theft, Destruction or Mutilation of Warrant. The Company covenants that upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of this Warrant or any stock certificate relating to the Warrant
Shares, and in case of loss, theft or destruction, of indemnity or security reasonably satisfactory to it (which, in the case
of the Warrant, shall not include the posting of any bond), and upon surrender and cancellation of such Warrant or stock certificate,
if mutilated, the Company will make and deliver a new Warrant or stock certificate of like tenor and dated as of such cancellation,
in lieu of such Warrant or stock certificate.

 

c)            Saturdays, Sundays, Holidays, etc. If the last or appointed day for the taking of any action or the expiration of any right
required or granted herein shall not be a Business Day, then such action may be taken or such right may be exercised on the next
succeeding Business Day.

 

d)            Authorized Shares.

 

The
Company covenants that, during the period the Warrant is outstanding, it will reserve from its authorized and unissued Common
Shares a sufficient number of shares to provide for the issuance of the Warrant Shares upon the exercise of any purchase rights
under this Warrant. The Company further covenants that its issuance of this Warrant shall constitute full authority to its officers
who are charged with the duty of issuing the necessary Warrant Shares upon the exercise of the purchase rights under this Warrant.
The Company will take all such reasonable action as may be necessary to assure that such Warrant Shares may be issued as provided
herein without violation of any applicable law or regulation, or of any requirements of the Trading Market upon which the Common
Shares may be listed. The Company covenants that all Warrant Shares which may be issued upon the exercise of the purchase rights
represented by this Warrant will, upon exercise of the purchase rights represented by this Warrant and payment for such Warrant
Shares in accordance herewith, be duly authorized, validly issued, fully paid and nonassessable and free from all taxes, liens
and charges created by the Company in respect of the issue thereof (other than taxes in respect of any transfer occurring contemporaneously
with such issue).

 

Except
and to the extent as waived or consented to by the Holder, the Company shall not by any action, including, without limitation,
amending its certificate of incorporation or through any reorganization, transfer of assets, consolidation, merger, dissolution,
issue or sale of securities or any other voluntary action, avoid or seek to avoid the observance or performance of any of the
terms of this Warrant, but will at all times in good faith assist in the carrying out of all such terms and in the taking of all
such actions as may be necessary or appropriate to protect the rights of Holder as set forth in this Warrant against impairment.
Without limiting the generality of the foregoing, the Company will (i) not increase the par value of any Warrant Shares above
the amount payable therefor upon such exercise immediately prior to such increase in par value, (ii) take all such action as may
be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable Warrant Shares
upon the exercise of this Warrant and (iii) use commercially reasonable efforts to obtain all such authorizations, exemptions
or consents from any public regulatory body having jurisdiction thereof, as may be, necessary to enable the Company to perform
its obligations under this Warrant.

 

     15

     

    

 

Before
taking any action which would result in an adjustment in the number of Warrant Shares for which this Warrant is exercisable or
in the Exercise Price, the Company shall obtain all such authorizations or exemptions thereof, or consents thereto, as may be
necessary from any public regulatory body or bodies having jurisdiction thereof.

 

e)                             Governing Law. All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall
be governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the
principles of conflicts of law thereof. Each party agrees that all legal proceedings concerning the interpretations, enforcement
and defense of the transactions contemplated by this Warrant (whether brought against a party hereto or their respective affiliates,
directors, officers, shareholders, partners, members, employees or agents) shall be commenced exclusively in the state and federal
courts sitting in the City of New York. Each party hereby irrevocably submits to the exclusive jurisdiction of the state and federal
courts sitting in the City of New York, Borough of Manhattan for the adjudication of any dispute hereunder or in connection herewith
or with any transaction contemplated hereby or discussed herein, and hereby irrevocably waives, and agrees not to assert in any
suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of any such court, that such suit,
action or proceeding is improper or is an inconvenient venue for such proceeding. Each party hereby irrevocably waives personal
service of process and consents to process being served in any such suit, action or proceeding by mailing a copy thereof via registered
or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under
this Warrant and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing
contained herein shall be deemed to limit in any way any right to serve process in any other manner permitted by law. If either
party shall commence an action, suit or proceeding to enforce any provisions of this Warrant, the prevailing party in such action,
suit or proceeding shall be reimbursed by the other party for their reasonable attorneys’ fees and other costs and expenses
incurred with the investigation, preparation and prosecution of such action or proceeding. The Company hereby appoints Cogency
Global Inc. as its agent for service of process in New York. The choice of the laws of the State of New York as the governing
law of this Warrant is a valid choice of law and would be recognized and given effect to in any action brought before a court
of competent jurisdiction in the State of Nevada, except for those laws (i) which such court considers to be procedural in nature,
(ii) which are revenue or penal laws or (iii) the application of which would be inconsistent with public policy, as such term
is interpreted under the laws of the State of Nevada. The Company or any of their respective properties, assets or revenues does
not have any right of immunity under Nevada or New York law, from any legal action, suit or proceeding, from the giving of any
relief in any such legal action, suit or proceeding, from set-off or counterclaim, from the jurisdiction of Nevada, New York or
United States federal court, from service of process, attachment upon or prior to judgment, or attachment in aid of execution
of judgment, or from execution of a judgment, or other legal process or proceeding for the giving of any relief or for the enforcement
of a judgment, in any such court, with respect to its obligations, liabilities or any other matter under or arising out of or
in connection with this Warrant; and, to the extent that the Company, or any of its properties, assets or revenues may have or
may hereafter become entitled to any such right of immunity in any such court in which proceedings may at any time be commenced,
the Company hereby waives such right to the extent permitted by law and hereby consents to such relief and enforcement as provided
in this Warrant and the other Transaction Documents.

 

     16

     

    

 

f)             Restrictions. The Holder acknowledges that the Warrant Shares acquired upon the exercise of this Warrant, if not registered,
and the Holder does not utilize cashless exercise, will have restrictions upon resale imposed by state and federal securities
laws.

 

g)            Nonwaiver and Expenses. No course of dealing or any delay or failure to exercise any right hereunder on the part of Holder
shall operate as a waiver of such right or otherwise prejudice the Holder’s rights, powers or remedies. Without limiting
any other provision of this Warrant, if the Company willfully and knowingly fails to comply with any provision of this Warrant,
which results in any material damages to the Holder, the Company shall pay to the Holder such amounts as shall be sufficient to
cover any costs and expenses including, but not limited to, reasonable attorneys’ fees, including those of appellate proceedings,
incurred by the Holder in collecting any amounts due pursuant hereto or in otherwise enforcing any of its rights, powers or remedies
hereunder.

 

h)            Notices. Any and all notices or other communications or deliveries to be provided by the Holders hereunder including, without
limitation, any Notice of Exercise, shall be in writing and delivered personally, by e-mail, or sent by a nationally recognized
overnight courier service, addressed to the Company, 325 Washington Avenue Extension, Albany, New York 12205, Attention: Jessica
Thomas, Chief Financial Officer] email address: jthomas@mtiinstruments.com, or such other email address or address as the Company
may specify for such purposes by notice to the Holders. Any and all notices or other communications or deliveries to be provided
by the Company hereunder shall be in writing and delivered personally, by e-mail, or sent by a nationally recognized overnight
courier service addressed to each Holder at the e-mail address or address of such Holder appearing on the books of the Company.
Any notice or other communication or deliveries hereunder shall be deemed given and effective on the earliest of (i) the time
of transmission, if such notice or communication is delivered via e-mail at the e-mail address set forth in this Section prior
to 5:30 p.m. (New York City time) on any date, (ii) the next Trading Day after the time of transmission, if such notice or communication
is delivered via e-mail at the e-mail address set forth in this Section on a day that is not a Trading Day or later than 5:30
p.m. (New York City time) on any Trading Day, (iii) the second Trading Day following the date of mailing, if sent by U.S. nationally
recognized overnight courier service, or (iv) upon actual receipt by the party to whom such notice is required to be given. To
the extent that any notice provided hereunder constitutes, or contains, material, non-public information regarding the Company
or any Subsidiaries, the Company shall simultaneously file such notice with the Commission pursuant to a Current Report on Form
8-K.

 

     17

     

    

 

i)             Limitation of Liability. No provision hereof, in the absence of any affirmative action by the Holder to exercise this Warrant
to purchase Warrant Shares, and no enumeration herein of the rights or privileges of the Holder, shall give rise to any liability
of the Holder for the purchase price of any Common Shares or as a shareholder of the Company, whether such liability is asserted
by the Company or by creditors of the Company.

 

j)             Remedies. The Holder, in addition to being entitled to exercise all rights granted by law, including recovery of damages,
will be entitled to specific performance of its rights under this Warrant. The Company agrees that monetary damages would not
be adequate compensation for any loss incurred by reason of a breach by it of the provisions of this Warrant and hereby agrees
to waive and not to assert the defense in any action for specific performance that a remedy at law would be adequate.

 

k)            Successors and Assigns. Subject to applicable securities laws, this Warrant and the rights and obligations evidenced hereby
shall inure to the benefit of and be binding upon the successors and permitted assigns of the Company and the successors and permitted
assigns of Holder. The provisions of this Warrant are intended to be for the benefit of any Holder from time to time of this Warrant
and shall be enforceable by the Holder or holder of Warrant Shares.

 

l)             Amendment. This Warrant may be modified or amended or the provisions hereof waived with the written consent of the Company,
on the one hand, and the Holder, on the other hand.

 

m)           Severability. Wherever possible, each provision of this Warrant shall be interpreted in such manner as to be effective
and valid under applicable law, but if any provision of this Warrant shall be prohibited by or invalid under applicable law, such
provision shall be ineffective to the extent of such prohibition or invalidity, without invalidating the remainder of such provisions
or the remaining provisions of this Warrant.

 

n)            Headings. The headings used in this Warrant are for the convenience of reference only and shall not, for any purpose, be
deemed a part of this Warrant.

 

********************

 

(Signature
Page Follows)

 

     18

     

    

IN
WITNESS WHEREOF, the Company has caused this Warrant to be executed by its officer thereunto duly authorized as of the date first
above indicated.

 

	 	Mechanical
                    Technology, Incorporated

	 	 
	 	By:	 
	 	

Name:
Michael Toporek 

Title:
Chief Executive Officer 

 

     19

     

    

NOTICE
OF EXERCISE

 

	To:	Mechanical
Technology, Incorporated

 

(1)  
The undersigned hereby elects to purchase ________ Warrant Shares of the Company pursuant to the terms of the attached Warrant
(only if exercised in full), and tenders herewith payment of the exercise price in full, together with all applicable transfer
taxes, if any.

 

(2)  
Payment shall take the form of (check applicable box):

 

[
] in lawful money of the United States; or

 

[
] if permitted the cancellation of such number of Warrant Shares as is necessary, in accordance with the formula set forth in
subsection 2(c), to exercise this Warrant with respect to the maximum number of Warrant Shares purchasable pursuant to the cashless
exercise procedure set forth in subsection 2(c).

 

(3)  
Please issue said Warrant Shares in the name of the undersigned or in such other name as is specified below:

 

_______________________________

 

The
Warrant Shares shall be delivered to the following DWAC Account Number:

 

_______________________________

 

_______________________________

 

_______________________________

 

[SIGNATURE
OF HOLDER]

 

Name
of Investing Entity: ___________________________________________________________________________________________ 

Signature
of Authorized Signatory of Investing Entity: _____________________________________________________________________ 

Name
of Authorized Signatory: _______________________________________________________________________________________ 

Title
of Authorized Signatory: ________________________________________________________________________________________ 

Date:
___________________________________________________________________________________________________________

 

     

     

    

ASSIGNMENT
FORM

 

(To
assign the foregoing Warrant, execute this form and supply required information. Do not use this form to purchase shares.)

 

FOR
VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to

 

	Name:	 
	 	(Please Print)
	 	 
	Address:	 
	 	(Please Print)
	 	 
	Phone Number:	 
	 	 
	Email Address:	 

  

	Dated:
    _______________ __, ______	 
	 	 
	Holder’s
    Signature: ___________________________	 
	 	 
	Holder’s
    Address: ___________________________Exhibit 4.4

 

THE REGISTERED HOLDER OF THIS PURCHASE
WARRANT BY ITS ACCEPTANCE HEREOF, AGREES THAT IT WILL NOT SELL, TRANSFER OR ASSIGN THIS PURCHASE WARRANT, OR ANY OF THE UNDERLYING
SECURITIES, EXCEPT AS HEREIN PROVIDED AND THE REGISTERED HOLDER OF THIS PURCHASE WARRANT AGREES THAT IT WILL NOT SELL, TRANSFER,
ASSIGN, PLEDGE OR HYPOTHECATE THIS PURCHASE WARRANT, OR ANY OF THE UNDERLYING SECURITIES, FOR A PERIOD OF ONE HUNDRED EIGHTY (180)
DAYS FOLLOWING THE COMMENCEMENT OF SALES OF THE OFFERING TO ANYONE OTHER THAN (I) UNIVEST SECURITIES, LLC, OR A REPRESENTATIVE
OR A SELECTED DEALER IN CONNECTION WITH THE OFFERING, OR (II) A BONA FIDE OFFICER OR PARTNER OF UNIVEST SECURITIES, LLC, OR OF
ANY SUCH UNDERWRITERS OR SELECTED DEALER.

 

THIS
PURCHASE WARRANT IS NOT EXERCISABLE PRIOR TO [●],
2021. VOID AFTER 5:00 P.M., EASTERN TIME, [●], 2026.

 

UNDERWRITER’S WARRANT

 

FOR
THE PURCHASE OF [●] SHARES OF COMMON STOCK

 

OF

 

MECHANICAL TECHNOLOGY, INCORPORATED

 

1.         Purchase
Warrant. THIS CERTIFIES THAT, pursuant to that certain Underwriting Agreement by and between MECHANICAL TECHNOLOGY, INCORPORATED,
a Nevada corporation (the “Company”), on one hand, and Univest Securities, LLC (the “Holder”),
on the other hand, dated [●], 2021 (the “Underwriting
Agreement”), the Holder, as registered owner of this Purchase Warrant, is entitled, at any time or from time to time
from [●], 20211 (the “Exercise
Date”), and at or before 5:00 p.m., Eastern time, on [●], 20262 (the “Expiration Date”),
but not thereafter, to subscribe for, purchase and receive, in whole or in part, up to [●] shares
of Common Stock of the Company3, par value $0.001 per share (“Common Stock”) ( (the “Shares”),
subject to adjustment as provided in Section 6 hereof. If the Expiration Date is a day on which banking institutions
are authorized by law to close, then this Purchase Warrant may be exercised on the next succeeding day which is not such a day
in accordance with the terms herein. During the period ending on the Expiration Date, the Company agrees not to take any action
that would terminate this Purchase Warrant. This Purchase Warrant is initially exercisable at $[●] per
share4; provided, however, that upon the occurrence of any of the events specified in Section
6 hereof, the rights granted by this Purchase Warrant, including the exercise price per share and the number of shares
of Common Stock to be received upon such exercise, shall be adjusted as therein specified. The term “Exercise Price”
shall mean the initial exercise price as set forth above or the adjusted exercise price as a result of the events set forth in
Section 6 below, depending on the context. Capitalized terms not defined herein shall have the meaning ascribed to them
in the Underwriting Agreement. 

 

2.         Exercise.

 

2.1           Exercise
Form. In order to exercise this Purchase Warrant, the exercise form attached hereto as Exhibit A must be duly
executed and completed and delivered to the Company, together with this Purchase Warrant and payment of the Exercise Price for
the shares of Common Stock being purchased payable in cash by wire transfer of immediately available funds to an account designated
by the Company or by certified check. If the subscription rights represented hereby shall not be exercised at or before 5:00 p.m.,
Eastern time, on the Expiration Date, this Purchase Warrant shall become and be void without further force or effect, and all rights
represented hereby shall cease and expire.

 

 

1 The date
of issuance of the Purchase Warrant 

2 Five years
after date of the issuance date of the Purchase Warrant 

3 Equal to
5% of the number of shares of Common Stock sold in the Offering 

4 Equal to
110% of the combined public offering price of the securities sold in the Offering

 

    1

     

    

 

   2.2           Cashless
Exercise. If at any time after the Exercise Date and until the Expiration Date, there is no effective registration statement
registering, or the prospectus contained therein is not available for the issuance of the Shares to the Holder, the Holder may
elect to receive the number of shares of Common Stock equal to the value of this Purchase Warrant (or the portion thereof being
exercised), by surrender of this Purchase Warrant to the Company, together with the exercise form attached hereto, in which event
the Company shall issue to Holder, Shares in accordance with the following formula:

 

	X	=	Y(A-B)	 	 
	A	 	 
	 	 	 	 
	Where,	X	=	The number of shares of Common Stock to be issued to Holder;
	 	Y	=	The number of shares of Common Stock for which the Purchase Warrant is being exercised;
	 	A	=	The fair market value of one share of Common Stock; and
	 	B	=	The Exercise Price.

 

For purposes of this Section
2.2, the “fair market value” of a share of Common Stock is defined as follows:

 

		(i)	if the shares of Common Stock are traded on a national securities
exchange, the value shall be deemed to be the closing price on such exchange for the five consecutive trading days ending on the
day immediately prior to the exercise form being submitted in connection with the exercise of the Purchase Warrant; or

 

		(ii)	if the shares of Common Stock are actively traded over-the-counter,
the value shall be deemed to be the weighted average price of the shares of Common Stock for the five consecutive trading days
ending on the trading day immediately prior to the exercise form being submitted in connection with the exercise of the Purchase
Warrant; or

 

		(iii)	if there is no market for the shares of Common Stock, the value shall
be the fair market value thereof, as determined in good faith by the Company’s Board of Directors.

 

2.3    
         Legend. Each certificate for the securities purchased under this Purchase
Warrant shall bear the following legends unless such securities have been registered under the Securities Act of 1933, as
amended (the “Act”), or are exempt from registration under the Act:

 

(i) “THE SECURITIES REPRESENTED
BY THIS CERTIFICATE ARE SUBJECT TO A LOCK-UP PERIOD OF ONE HUNDRED AND EIGHTY (180) DAYS FOLLOWING THE COMMENCEMENT OF SALES OF
THE OFFERING PURSUANT TO THE REGISTRATION STATEMENT OF THE COMPANY’S SECURITIES (FILE NO. 333-254064) AND MAY NOT
BE (A) SOLD, TRANSFERRED, ASSIGNED, PLEDGED OR HYPOTHECATED TO ANYONE OTHER THAN UNIVEST SECURITIES, LLC, OR BONA FIDE OFFICERS
OR PARTNERS OF UNIVEST SECURITIES, LLC, OR (B) CAUSED TO BE THE SUBJECT OF ANY HEDGING, SHORT SALE, DERIVATIVE, PUT OR CALL TRANSACTION
THAT WOULD RESULT IN THE EFFECTIVE ECONOMIC DISPOSITION OF THIS SECURITIES HEREUNDER, EXCEPT AS PROVIDED FOR IN FINRA RULE 5110(E)(2).”

 

(ii) Any legend required by
the securities laws of any state to the extent such laws are applicable to the Shares represented by a certificate, instrument,
or book entry so legended.

 

3.            Transfer.

 

3.1           General
Restrictions. The registered Holder of this Purchase Warrant agrees by his, her or its acceptance hereof, that such Holder
will not: (a) sell, transfer, assign, pledge or hypothecate this Purchase Warrant or any of the Shares exercisable hereunder for
a period of one hundred eighty (180) days following the commencement of sales of the offering (the “Initial Transfer Date”)
to anyone other than: (i) the Underwriter or a selected dealer participating in the Offering, or (ii) a bona fide officer or partner
of the Underwriter or of any such selected dealer, in each case in accordance with FINRA Conduct Rule 5110(g)(1), or (b) cause
this Purchase Warrant or the securities issuable hereunder to be the subject of any hedging, short sale, derivative, put or call
transaction that would result in the effective economic disposition of this Purchase Warrant or the securities hereunder, except
as provided for in FINRA Rule 5110(g)(2). On and after the Initial Transfer Date, transfers to others may be made subject to compliance
with or exemptions from applicable securities laws. In order to make any permitted assignment, the Holder must deliver to the Company
the assignment form attached hereto as Exhibit B duly executed and completed, together with this Purchase Warrant
and payment of all transfer taxes, if any, payable in connection therewith. The Company shall within five (5) Business Days transfer
this Purchase Warrant on the books of the Company and shall execute and deliver a new warrant or warrants of like tenor to the
appropriate assignee(s) expressly evidencing the right to purchase the aggregate number of shares of Common Stock purchasable hereunder
or such portion of such number as shall be contemplated by any such assignment.

    2

     

    

 

3.2           Restrictions
Imposed by the Act. The securities evidenced by this Purchase Warrant shall not be transferred unless and until: (i) the Company
has received the opinion of counsel for the Company that the securities may be transferred pursuant to an exemption from registration
under the Act and applicable state securities laws, the availability of which is established to the reasonable satisfaction of
the Company, (ii) a registration statement or a post-effective amendment to the Registration Statement relating to the offer and
sale of such securities that has been declared effective by the U.S. Securities and Exchange Commission (the “Commission”)
and includes a current prospectus or (iii) a registration statement, pursuant to which the Holder has exercised its registration
rights pursuant to Sections 4.1 and 4.2 herein, relating to the offer and sale of such securities has been filed
and declared effective by the Commission and compliance with applicable state securities law has been established.

 

4.           Registration
Rights. The Company shall be required to keep a registration statement effective on Form S-1 until such date that is the earlier
of the date when all of the shares of Common Stock underlying this Purchase Warrant have been publicly sold by the Holder or such
time as Rule 144 or another similar exemption under the Securities Act of 1933, as amended, is available for the sale of all of
such Holder’s Shares underlying this Purchase Warrant without registration.

 

5.           New
Purchase Warrants to be Issued.

 

5.1           Partial
Exercise or Transfer. Subject to the restrictions in Section 3 hereof, this Purchase Warrant may be exercised
or assigned in whole or in part. In the event of the exercise or assignment hereof in part only, upon surrender of this Purchase
Warrant for cancellation, together with the duly executed exercise or assignment form and funds sufficient to pay any Exercise
Price and/or transfer tax if exercised pursuant to Section 2.1 hereof, the Company shall cause to be delivered
to the Holder without charge a new warrant of like tenor to this Purchase Warrant in the name of the Holder evidencing the right
of the Holder to purchase the number of shares of Common Stock purchasable hereunder as to which this Purchase Warrant has not
been exercised or assigned.

 

5.2           Lost
Certificate. Upon receipt by the Company of evidence satisfactory to it of the loss, theft, destruction or mutilation of this
Purchase Warrant and of reasonably satisfactory indemnification or the posting of a bond, the Company shall execute and deliver
a new warrant of like tenor and date. Any such new warrant executed and delivered as a result of such loss, theft, mutilation or
destruction shall constitute a substitute contractual obligation on the part of the Company.

 

6.           Adjustments.

 

6.1           Adjustments
to Exercise Price and Number of shares of Common Stock. The Exercise Price and the number of Shares of Common Stock underlying
this Purchase Warrant shall be subject to adjustment from time to time as hereinafter set forth:

 

 6.1.1           Share
Dividends; Split Ups. If, after the date hereof, and subject to the provisions of Section 6.3 below, the number
of outstanding shares of Common Stock is increased by a stock dividend payable in shares of Common Stock or by a split up of shares
of Common Stock or other similar event, then, on the effective day thereof, the number of shares of Common Stock purchasable hereunder
shall be increased in proportion to such increase in outstanding shares of Common Stock , and the Exercise Price shall be proportionately
decreased.

 

    3

     

    

 

6.1.2           Aggregation
of Shares of Common Stock. If, after the date hereof, and subject to the provisions of Section 6.3 below,
the number of outstanding shares of Common Stock is decreased by a consolidation, combination or reclassification of shares of
Common Stock or other similar event, then, on the effective date thereof, the number of shares of Common Stock purchasable hereunder
shall be decreased in proportion to such decrease in outstanding shares, and the Exercise Price shall be proportionately increased.

 

6.1.3           Replacement
of shares of Common Stock upon Reorganization, etc. In case of any reclassification or reorganization of the outstanding shares
of Common Stock other than a change covered by Section 6.1.1 or Section 6.1.2 hereof or that
solely affects the par value of such shares of Common Stock, or in the case of any share reconstruction or amalgamation or consolidation
of the Company with or into another corporation (other than a consolidation or share reconstruction or amalgamation in which the
Company is the continuing corporation and that does not result in any reclassification or reorganization of the outstanding shares
of Common Stock ), or in the case of any sale or conveyance to another corporation or entity of the property of the Company as
an entirety or substantially as an entirety in connection with which the Company is dissolved, the Holder of this Purchase Warrant
shall have the right thereafter (until the expiration of the right of exercise of this Purchase Warrant) to receive upon the exercise
hereof, for the same aggregate Exercise Price payable hereunder immediately prior to such event, the kind and amount of shares
of Common Stock or other securities or property (including cash) receivable upon such reclassification, reorganization, share reconstruction
or amalgamation, or consolidation, or upon a dissolution following any such sale or transfer, by a Holder of the number of shares
of Common Stock of the Company obtainable upon exercise of this Purchase Warrant immediately prior to such event; and if any reclassification
also results in a change in shares of Common Stock covered by Section 6.1.1 or Section 6.1.2, then
such adjustment shall be made pursuant to Section 6.1.1, Section 6.1.2 and this Section 6.1.3.
The provisions of this Section 6.1.3 shall similarly apply to successive reclassifications, reorganizations, share
reconstructions or amalgamations, or consolidations, sales or other transfers.

 

6.1.4        Fundamental
Transaction. If, at any time while this Purchase Warrant is outstanding, the Company enters into the following transactions
with another Person or group of Persons whereby such other Person or group acquires more than 50% of the outstanding shares of
Common Stock (not including any shares of Common Stock held by the other Person or other Persons making or party to, or associated
or affiliated with, the other Persons making or party to such stock or share purchase agreement or other business combination):
(i) the Company, directly or indirectly, in one or more related transactions effects any merger or consolidation of the Company
with or into another Person, (ii) the Company, directly or indirectly, effects any sale, lease, license, assignment, transfer,
conveyance or other disposition of all or substantially all of its assets in one or a series of related transactions, (iii) any
direct or indirect purchase offer, tender offer or exchange offer (whether by the Company or another Person) is completed pursuant
to which holders of shares of Common Stock are permitted to sell, tender or exchange their shares for other securities, cash or
property and has been accepted by the holders of 50% or more of the outstanding shares of Common Stock, (iv) the Company, directly
or indirectly, in one or more related transactions effects any reclassification, reorganization or recapitalization of the shares
of Common Stock or any compulsory share exchange pursuant to which the shares of Common Stock is effectively converted into or
exchanged for other securities, cash or property, or (v) the Company, directly or indirectly, in one or more related transactions
consummates a stock or share purchase agreement or other business combination (including, without limitation, a reorganization,
recapitalization, spinoff or scheme of arrangement) with another Person or group of Persons (each a “Fundamental Transaction”),
then, upon any subsequent exercise of this Purchase Warrant, the Holder shall have the right to receive, for each Share that would
have been issuable upon such exercise immediately prior to the occurrence of such Fundamental Transaction, the number shares of
Common Stock of the successor or acquiring corporation or of the Company, if it is the surviving corporation, and any additional
or alternative consideration (the “Alternative Consideration”) receivable as a result of such Fundamental Transaction
by a holder of the number of shares of Common Stock for which this Purchase Warrant is exercisable immediately prior to such Fundamental
Transaction. For purposes of any such exercise, the determination of the Exercise Price shall be appropriately adjusted to apply
to such Alternative Consideration based on the amount of Alternative Consideration issuable in respect of one Common Stock in such
Fundamental Transaction, and the Company shall apportion the Exercise Price among the Alternative Consideration in a reasonable
manner reflecting the relative value of any different components of the Alternative Consideration. If holders of shares of Common
Stock are given any choice as to the securities, cash or property to be received in a Fundamental Transaction, then the Holder
shall be given the same choice as to the Alternative Consideration it receives upon any exercise of this Purchase Warrant following
such Fundamental Transaction. The Company shall cause any successor entity in a Fundamental Transaction in which the Company is
not the survivor (the “Successor Entity”) to assume in writing all of the obligations of the Company under this
Purchase Warrant, and to deliver to the Holder in exchange for this Purchase Warrant a security of the Successor Entity evidenced
by a written instrument substantially similar in form and substance to this Purchase Warrant which is exercisable for a corresponding
number of shares of capital stock of such Successor Entity (or its parent entity) equivalent to the shares of Common Stock acquirable
and receivable upon exercise of this Purchase Warrant prior to such Fundamental Transaction, and with an exercise price which applies
the Exercise Price hereunder to such shares of capital stock (but taking into account the relative value of the shares of Common
Stock pursuant to such Fundamental Transaction and the value of such shares of capital stock, such number of shares of capital
stock and such exercise price being for the purpose of protecting the economic value of this Purchase Warrant immediately prior
to the consummation of such Fundamental Transaction). Upon the occurrence of any such Fundamental Transaction, the Successor Entity
shall succeed to, and be substituted for (so that from and after the date of such Fundamental Transaction, the provisions of this
Purchase Warrant and the other Transaction Documents referring to the “Company” shall refer instead to the Successor
Entity), and may exercise every right and power of, the Company and shall assume all of the obligations of the Company, under this
Purchase Warrant and the other Transaction Documents with the same effect as if such Successor Entity had been named as the Company
herein.

    4

     

    

 

 6.1.5   Changes
in Form of Purchase Warrant. This form of Purchase Warrant need not be changed because of any change pursuant to this Section
6.1, and any warrants issued after such change, in exchange or replacement of this Purchase Warrant may state the same Exercise
Price and the same number of shares of Common Stock as are stated in the Purchase Warrant initially issued pursuant to this Agreement.
The acceptance by any Holder of the issuance of a new warrants reflecting a required or permissive change shall not be deemed to
waive any rights to an adjustment occurring after the date hereof or the computation thereof.

 

6.2           Substitute
Purchase Warrant. In case of any consolidation of the Company with, or share reconstruction or amalgamation of the Company
with or into, another corporation (other than a consolidation or share reconstruction or amalgamation which does not result in
any reclassification or change of the outstanding shares of Common Stock ), the corporation formed by such consolidation or share
reconstruction or amalgamation shall execute and deliver to the Holder a supplemental warrant providing that the holder of this
Purchase Warrant shall have the right thereafter (until the stated expiration of this Purchase Warrant) to receive, upon exercise
of such supplemental warrant, the kind and amount of shares of common stock and other securities and property receivable upon such
consolidation or share reconstruction or amalgamation, by a holder of the number of shares of Common Stock of the Company for which
such Purchase Warrant might have been exercised immediately prior to such consolidation, share reconstruction or amalgamation,
sale or transfer. Such supplemental warrant shall provide for adjustments which shall be substantially the same to the adjustments
provided for in this Section 6. The above provisions of this Section 6 shall similarly apply to successive
consolidations or share reconstructions or amalgamations. 

 

6.3           Elimination
of Fractional Interests. The Company shall not be required to issue certificates representing fractions of shares of Common
Stock upon the exercise of this Purchase Warrant, nor shall it be required to issue scrip or pay cash in lieu of any fractional
interests, it being the intent of the parties that all fractional interests shall be eliminated by rounding any fraction up or
down, as the case may be, to the nearest whole number of shares of Common Stock or other securities, properties or rights.

 

7.           Reservation
and Listing. The Company shall at all times reserve and keep available out of its authorized shares of Common Stock, solely
for the purpose of issuance upon exercise of this Purchase Warrant, such number of shares of Common Stock or other securities,
properties or rights as shall be issuable upon the exercise thereof. The Company covenants and agrees that, upon exercise of this
Purchase Warrant and payment of the Exercise Price therefor, unless this Purchase Warrant is exercised pursuant to a cashless exercise,
as provided in Section 2.2 hereof, in accordance with the terms hereby, all shares of Common Stock and other securities
issuable upon such exercise shall be duly and validly issued, fully paid and non-assessable and not subject to preemptive rights
of any shareholder. The Company further covenants and agrees that upon exercise of this Purchase Warrant and payment of the exercise
price therefor, unless this Purchase Warrant is exercised pursuant to a cashless exercise, as provided in Section 2.2 hereof,
all shares of Common Stock and other securities issuable upon such exercise shall be duly and validly issued, fully paid and non-assessable
and not subject to preemptive rights of any shareholder. As long as this Purchase Warrant shall be outstanding, the Company shall
use its commercially reasonable efforts to cause all shares of Common Stock issuable upon exercise of this Purchase Warrant to
be listed (subject to official notice of issuance) on all national securities exchanges (or, if applicable, on the OTCQB Market
or any successor quotation system) on which the shares of Common Stock are then listed and/or quoted (if at all).

    5

     

    

 

8.           Certain
Notice Requirements.

 

8.1           Holder’s
Right to Receive Notice. Nothing herein shall be construed as conferring upon the Holder the right to vote or consent or to
receive notice as a shareholder for the election of directors or any other matter, or as having any rights whatsoever as a shareholder
of the Company. If, however, at any time prior to the expiration of this Purchase Warrant and the exercise thereof, any of the
events described in Section 8.2 shall occur, then, in one or more of said events, the Company shall give written
notice of such event at least fifteen days prior to the date fixed as a record date or the date of closing the transfer books (the
“Notice Date”) for the determination of the shareholders entitled to such dividend, distribution, conversion
or exchange of securities or subscription rights, or entitled to vote on such proposed dissolution, liquidation, winding up or
sale. Such notice shall specify such record date or the date of the closing of the transfer books, as the case may be. Notwithstanding
the foregoing, the Company shall deliver to the Holder a copy of each notice given to the other shareholders of the Company at
the same time and in the same manner that such notice is given to the shareholders.

 

8.2           Events
Requiring Notice. The Company shall be required to give the notice described in this Section 8 upon one or
more of the following events: (i) if the Company shall take a record of the holders of its shares of Common Stock for the purpose
of entitling them to receive a dividend or distribution payable otherwise than in cash, or a cash dividend or distribution payable
otherwise than out of retained earnings, as indicated by the accounting treatment of such dividend or distribution on the books
of the Company, (ii) the Company shall offer to all the holders of its shares of Common Stock any additional shares of capital
stock of the Company or securities convertible into or exchangeable for shares of capital stock of the Company, or any option,
right or warrant to subscribe therefor, or (iii) a dissolution, liquidation or winding up of the Company (other than in connection
with a consolidation or share reconstruction or amalgamation) or a sale of all or substantially all of its property, assets and
business shall be proposed. 

 

8.3           Notice
of Change in Exercise Price. The Company shall, promptly after an event requiring a change in the Exercise Price pursuant to Section
6 hereof, send notice to the Holder of such event and change (“Price Notice”). The Price Notice shall
describe the event causing the change and the method of calculating same and shall be certified as being true and accurate by the
Company’s Chief Financial Officer.

 

8.4          Transmittal
of Notices. All notices, requests, consents and other communications under this Purchase Warrant shall be in writing and shall
be deemed to have been duly made if made in accordance with the notice provisions of the Underwriting Agreement to the addresses
and contact information set forth below:

 

If to the Holder, then to:

 

Univest Securities, LLC 

375 Park Avenue, 15th Floor 

New York, NY 10152 

Attn:    Edric Guo 

Email:   yguo@univest.us

 

With a copy to:

 

Hunter Taubman Fischer & Li LLC

800 Third Avenue, Suite 2800

New York, NY 10022

Attn:  Ying Li, Esq.

Email:  yli@htflawyers.com

 

    6

     

    

 

If to the Company:

 

Mechanical Technology, Incorporated 

325 Washington Avenue Extension

Albany, NY 12206

(518) 218-2550

Attn:     Michael Toporek 

Email:    MToporek@mtiinstruments.com

 

With a copy to:

 

Sullivan & Worcester LLP 

1633 Broadway 

New York, NY 10019 

Attn:    David E. Danovitch, Esq. 

Email:   ddanovitch@sullivanlaw.com

 

9.           Miscellaneous.

 

9.1           Amendments.
The Company and the Underwriter may from time to time supplement or amend this Purchase Warrant without the approval of the Holder
in order to cure any ambiguity, to correct or supplement any provision contained herein that may be defective or inconsistent with
any other provisions herein, or to make any other provisions in regard to matters or questions arising hereunder that the Company
and the Underwriter may deem necessary or desirable and that the Company and the Underwriter deem shall not adversely affect the
interest of the Holder. All other modifications or amendments shall require the written consent of and be signed by the party against
whom enforcement of the modification or amendment is sought.

 

9.2           Headings.
The headings contained herein are for the sole purpose of convenience of reference, and shall not in any way limit or affect the
meaning or interpretation of any of the terms or provisions of this Purchase Warrant.

 

9.3.           Entire
Agreement. This Purchase Warrant (together with the other agreements and documents being delivered pursuant to or in connection
with this Purchase Warrant) constitutes the entire agreement of the parties hereto with respect to the subject matter hereof, and
supersedes all prior agreements and understandings of the parties, oral and written, with respect to the subject matter hereof.

 

9.4           Binding
Effect. This Purchase Warrant shall inure solely to the benefit of and shall be binding upon, the Holder and the Company and
their permitted assignees, respective successors, legal representative and assigns, and no other person shall have or be construed
to have any legal or equitable right, remedy or claim under or in respect of or by virtue of this Purchase Warrant or any provisions
herein contained.

 

9.5           Governing
Law; Submission to Jurisdiction; Trial by Jury. This Purchase Warrant shall be governed by and construed and enforced in accordance
with the laws of the State of New York, without giving effect to conflict of laws principles thereof. The Company hereby agrees
that any action, proceeding or claim against it arising out of, or relating in any way to this Purchase Warrant shall be brought
and enforced in the New York Supreme Court, County of New York, or in the United States District Court for the Southern District
of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall be exclusive. The Company hereby waives any
objection to such exclusive jurisdiction and that such courts represent an inconvenient forum. Any process or summons to be served
upon the Company may be served by transmitting a copy thereof by registered or certified mail, return receipt requested, postage
prepaid, addressed to it at the address set forth in Section 8 hereof. Such mailing shall be deemed personal service
and shall be legal and binding upon the Company in any action, proceeding or claim. The Company and the Holder agree that the prevailing
party(ies) in any such action shall be entitled to recover from the other party(ies) all of its reasonable attorneys’ fees
and expenses relating to such action or proceeding and/or incurred in connection with the preparation therefor. The Company (on
its behalf and, to the extent permitted by applicable law, on behalf of its stockholders and affiliates) and the Holder hereby
irrevocably waive, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding
arising out of or relating to this Agreement or the transactions contemplated hereby.

 

    7

     

    

 

9.6           Waiver,
etc. The failure of the Company or the Holder to at any time enforce any of the provisions of this Purchase Warrant shall not
be deemed or construed to be a waiver of any such provision, nor to in any way affect the validity of this Purchase Warrant or
any provision hereof or the right of the Company or any Holder to thereafter enforce each and every provision of this Purchase
Warrant. No waiver of any breach, non-compliance or non-fulfillment of any of the provisions of this Purchase Warrant shall be
effective unless set forth in a written instrument executed by the party or parties against whom or which enforcement of such waiver
is sought; and no waiver of any such breach, non-compliance or non-fulfillment shall be construed or deemed to be a waiver of any
other or subsequent breach, non-compliance or non-fulfillment.

 

9.7       Holder
Not Deemed a Shareholder. Except as otherwise specifically provided herein, the Holder, solely in its capacity as a holder
of this Purchase Warrant, shall not be entitled to vote or receive dividends or be deemed the holder of share capital of the Company
for any purpose, nor shall anything contained in this Purchase Warrant be construed to confer upon the Holder, solely in its capacity
as the Holder of this Purchase Warrant, any of the rights of a shareholder of the Company or any right to vote, give or withhold
consent to any corporate action (whether any reorganization, issue of share, reclassification of share, consolidation, merger,
conveyance or otherwise), receive notice of meetings, receive dividends or subscription rights, or otherwise, prior to the issuance
to the Holder of the Shares which it is then entitled to receive upon the due exercise of this Purchase Warrant. In addition, nothing
contained in this Purchase Warrant shall be construed as imposing any liabilities on the Holder to purchase any securities (upon
exercise of this Purchase Warrant or otherwise) or as a shareholder of the Company, whether such liabilities are asserted by the
Company or by creditors of the Company.

 

9.8       Restrictions.
The Holder acknowledges that the Shares acquired upon the exercise of this Purchase Warrant, if not registered, and the Holder
does not utilize cashless exercise, will have restrictions upon resale imposed by state and federal securities laws.

 

9.9       Severability.
Wherever possible, each provision of this Purchase Warrant shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Purchase Warrant shall be prohibited by or invalid under applicable law, such provision
shall be ineffective to the extent of such prohibition or invalidity, without invalidating the remainder of such provision or the
remaining provisions of this Purchase Warrant.

 

[Signature Page to Follow]

 

    8

     

    

IN WITNESS WHEREOF, the Company has
caused this Purchase Warrant to be signed by its duly authorized officer as of the ____ day of _______, 2021.

 

	 	MECHANICAL TECHNOLOGY, INCORPORATED
	 	 	 
	 	By: 	 
	 	 	Name: Michael Toporek
	 	 	Title: CEO

    9

     

    

EXHIBIT A

 

Exercise Notice

 

Form to be used to exercise Purchase Warrant:

 

Date: __________, 2021

 

The undersigned hereby
elects irrevocably to exercise the Purchase Warrant for ______ shares of Common Stock of MECHANICAL TECHNOLOGY, INCORPORATED, a
Nevada corporation (the “Company”) and hereby makes payment of $____ (at the rate of $____ per share) in payment
of the Exercise Price pursuant thereto. Please issue the shares of Common Stock as to which this Purchase Warrant is exercised
in accordance with the instructions given below and, if applicable, a new Purchase Warrant representing the number of shares of
Common Stock for which this Purchase Warrant has not been exercised.

 

or

 

The undersigned hereby
elects irrevocably to convert its right to purchase ___ shares of Common Stock under the Purchase Warrant for ______ shares of
Common Stock, as determined in accordance with the following formula:

 

	 	 X	 =	Y(A-B)	 
	 	A	 
	Where,	X	=	The number of shares of Common Stock to be issued to Holder;
	 	Y	=	The number of shares of Common Stock for which the Purchase Warrant is being exercised;
	 	A	=	The fair market value of one share of Common Stock which is equal to $_____; and
	 	B	=	The Exercise Price which is equal to $______ per share

 

The undersigned agrees
and acknowledges that the calculation set forth above is subject to confirmation by the Company and any disagreement with respect
to the calculation shall be resolved by the Company in its sole discretion.

 

Please issue the shares
of Common Stock as to which this Purchase Warrant is exercised in accordance with the instructions given below and, if applicable,
a new Purchase Warrant representing the number of shares of Common Stock for which this Purchase Warrant has not been converted.

 

Signature

 

Signature Guaranteed

 

INSTRUCTIONS FOR REGISTRATION OF SECURITIES

 

Name: 

(Print in Block Letters) 

Address:

 

NOTICE: The signature
to this form must correspond with the name as written upon the face of the Purchase Warrant without alteration or enlargement or
any change whatsoever, and must be guaranteed by a bank, other than a savings bank, or by a trust company or by a firm having membership
on a registered national securities exchange.

 

    10

     

    

EXHIBIT B

 

Assignment Notice

 

Form to be used to assign Purchase Warrant:

 

ASSIGNMENT

 

(To be executed by the registered Holder to effect a transfer
of the within Purchase Warrant):

 

FOR VALUE RECEIVED,                                                      does
hereby sell, assign and transfer unto the right to purchase   shares of Common Stock of MECHANICAL TECHNOLOGY,
INCORPORATED, a Nevada corporation (the “Company”), evidenced by the Purchase Warrant and does hereby authorize
the Company to transfer such right on the books of the Company.

 

Dated:           ,
2021

 

Signature

 

Signature Guaranteed

 

NOTICE: The signature
to this form must correspond with the name as written upon the face of the within Purchase Warrant without alteration or enlargement
or any change whatsoever, and must be guaranteed by a bank, other than a savings bank, or by a trust company or by a firm having
membership on a registered national securities exchange.

 

    11

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