Document:

Exhibit
4.4

 

THE
SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE
SALE AND DISTRIBUTION THEREOF, AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES
ACT”) OR ANY STATE SECURITIES LAWS. SUCH SECURITIES MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION
OR AN OPINION OF COUNSEL IN A FORM REASONABLY ACCEPTABLE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED DUE TO AN EXEMPTION
THEREFROM UNDER SAID ACT AND ANY APPLICABLE STATE SECURITIES LAWS.

 

Date
of Issuance: June 29, 2010

 

WARRANT
TO PURCHASE

 

SHARES
OF PREFERRED STOCK OF

 

COULOMB
TECHNOLOGIES, INC.

 

(Void
after April 30, 2021)

 

This
certifies that [    ], or assigns (“Holder”), for value received, is entitled to purchase from COULOMB TECHNOLOGIES,
INC., a Delaware corporation (“Company”), the number of fully paid and nonassessable shares of, at Holder’s
option, either (i) the Current Round Stock (hereinafter defined) or (ii) the Next Round Stock (hereinafter defined) (the Current
Round Stock or the Next Round Stock, as applicable, “Preferred Stock”) for cash at a purchase price per share
hereinafter determined (the “Stock Purchase Price”). Holder may also exercise this Warrant on a cashless or
“net issuance” basis as described in Section 1(b) below, and this Warrant shall be deemed to have been exercised
in full on such basis on the Expiration Date, to the extent not fully exercised prior to such date. This Warrant is issued in
connection with the Loan and Security Agreement of even date herewith (as amended, restated and supplemented from time to time,
the “Loan Agreement”), between Company, as borrower, and Holder’s subsidiary, [ ], as lender (“Lender”).
Capitalized terms used herein and not otherwise defined in this Warrant shall have the meaning(s) ascribed to them in the Loan
Agreement, unless the context would otherwise require. On the Borrowing Date of each Growth Capital Loan advanced to Company by
Lender the type of Preferred Stock for which Holder may opt to exercise this Warrant and the corresponding Stock Purchase Price
shall be determined by dividing (X) the product of (i) 0.055 and (ii) the original principal amount of the Growth Capital Loan
advanced on such Borrowing Date, by (Y) the Stock Purchase Price. For purposes of illustration and not of limitation Schedule
1 sets forth examples of the actual numbers and types of shares of Company’s Preferred Stock issuable upon exercise of the
Warrant and the initial Stock Purchase Price for such shares based upon the facts assumed therein for purposes of such illustration.

 

“Current
Round Stock” means Company’s Series B Preferred Stock, provided that if Company closes a round of equity financing
in which Company issues and sells shares of its Series C Preferred Stock then from and after such closing the term “Current
Round Stock” shall mean Company’s Series C Preferred Stock. “Next Round Stock” means Company’s
Series C Preferred Stock (or whatever series is issued and sold in the next bona fide round of equity financing after the date
hereof in which Company sells or issues shares of its equity securities), provided that if Company closes a round of equity financing
in which Company issues and sells shares of its Series D Preferred Stock then from and after such closing the term “Next
Round Stock” shall mean Company’s Series D Preferred Stock.

 

     

     

    

 

If
on the Borrowing Date of the applicable Loan the term “Current Round Stock” means Company’s Series B
Preferred Stock and Holder chooses for the associated shares issuable upon exercise of this Warrant to consist of Company’s
Series B Preferred Stock, then Stock Purchase Price shall be equal to the lesser of (A) $0.2143 per share and (B) the lowest price
per share at which Company most recently sold (as of any date of determination) shares of its Series B Preferred Stock (subject
to any adjustment for any splits, dividends or distributions since the date of such sale). If on the Borrowing Date of the applicable
Loan the term “Next Round Stock” means Company’s Series C. Preferred Stock and Holder chooses for the
associated shares issuable upon exercise of this Warrant to consist of Company’s Series C Preferred Stock, then Stock Purchase
Price shall be the lowest price per share at which Company most recently sold (as of any date of determination) shares of its
Series C Preferred Stock (subject to any adjustment for any splits, dividends or distributions since the date of such sale). If
on the Borrowing Date of the applicable Loan the term “Current Round Stock” means Company’s Series C
Preferred Stock and Holder chooses for the associated shares issuable upon exercise of this Warrant to consist of Company’s
Series C Preferred Stock, then Stock Purchase Price shall be the lowest price per share at which Company most recently sold (as
of any date of determination) shares of its Series C Preferred Stock (subject to any adjustment for any splits, dividends or distributions
since the date of such sale). If on the Borrowing Date of the applicable Loan the term “Next Round Stock” means
Company’s Series D Preferred Stock and Holder chooses for the associated shares issuable upon exercise of this Warrant to
consist of Company’s Series D Preferred Stock, then Stock Purchase Price shall be the lowest price per share at which Company
most recently sold (as of any date of determination) shares of its Series D Preferred Stock (subject to any adjustment for any
splits, dividends or distributions since the date of such sale).

 

This
Warrant may be exercised at any time or from time to time up to and including 5:00 p.m. (Pacific time) on April 30, 2021 (the
“Expiration Date”), upon surrender to Company at its principal office at 1692 Dell Avenue, Campbell, CA 95008
(or at such other location as Company may advise Holder in writing) of this Warrant properly endorsed with the Form of Subscription
attached hereto duly completed and signed and upon payment in cash or by check of the aggregate Stock Purchase Price for the number
of shares for which this Warrant is being exercised determined in accordance with the provisions hereof. The Stock Purchase Price
and the number of shares purchasable hereunder are subject to further adjustment as provided in Section 4 of this Warrant.

 

    2

     

    

 

This
Warrant is subject to the following terms and conditions:

 

1. Exercise;
Issuance of Certificates; Payment for Shares.

 

(a) Unless
an election is made pursuant to clause (b) of this Section 1, this Warrant shall be exercisable at the option of Holder, at any
time or from time to time, on or before the Expiration Date for all or any portion of the shares of Preferred Stock (but not for
a fraction of a share) which may be purchased hereunder for the Stock Purchase Price multiplied by the number of shares to be
purchased. In the event, however, that pursuant to Company’s Certificate of Incorporation, as amended, an event causing
automatic conversion of Company’s Preferred Stock shall have occurred prior to the exercise of this Warrant, in whole or
in part, then this Warrant shall be exercisable for the number of shares of Common Stock of Company into which the Preferred Stock
not purchased upon any prior exercise of this Warrant would have been so converted (and, where the context requires, reference
to “Preferred Stock” shall be deemed to be or include such Common Stock, as may be appropriate). Company agrees
that the shares of Preferred Stock purchased under this Warrant shall be and are deemed to be issued to Holder hereof as the record
owner of such shares as of the close of business on the date on which the form of subscription shall have been delivered and payment
made for such shares. Subject to the provisions of Section 2, certificates for the shares of Preferred Stock so purchased, together
with any other securities or property to which Holder hereof is entitled upon such exercise, shall be delivered to Holder hereof
by Company at Company’s expense within a reasonable time after the rights represented by this Warrant have been so exercised.
Except as provided in clause (b) of this Section 1, in case of a purchase of less than all the shares which may be purchased under
this Warrant, Company shall cancel this Warrant and execute and deliver a new Warrant or Warrants of like tenor for the balance
of the shares purchasable under this Warrant surrendered upon such purchase to Holder hereof within a reasonable time. Each stock
certificate so delivered shall be in such denominations of Preferred Stock as may be requested by Holder hereof and shall be registered
in the name of such Holder or such other name as shall be designated by such Holder, subject to the limitations contained in Section
2.

 

(b) Holder,
in lieu of exercising this Warrant by the cash payment of the Stock Purchase Price pursuant to clause (a) of this Section 1, may
elect, at any time on or before the Expiration Date, to surrender this Warrant and receive that number of shares of Preferred
Stock computed using the following formula:

 

	 		Y (A — B)	 
	 	X = 	-------	 
	 	 	        A	 

 

		Where:	X
= the number of shares of Preferred Stock to be issued to Holder.

 

		Y	= 	the number of shares of Preferred Stock that Holder
would otherwise have been entitled to purchase hereunder pursuant to Section 1(a) (or such lesser number of shares as Holder may
designate in the case of a partial exercise of this Warrant).

 

		A	= 	the Per Share Price (as defined in Section 1(c) below)
of one (1) share of Preferred Stock at the time the net issuance election under this Section 1(b) is made.

 

		B	= 	the Stock Purchase Price then in effect.

 

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Election
to exercise under this Section 1(b) may be made by delivering a signed form of subscription to Company via facsimile, to be followed
by delivery of this Warrant. Notwithstanding anything to the contrary contained in this Warrant, if as of the close of business
on the last business day preceding the Expiration Date this Warrant remains unexercised as to all or a portion of the shares of
Preferred Stock purchasable hereunder, then effective as 9:00 a.m. (Pacific time) on the Expiration Date, Holder shall be deemed,
automatically and without need for notice to the Company, to have elected to exercise this Warrant in full pursuant to the provisions
of this Section 1(b), and upon surrender of this Warrant shall be entitled to receive that number of shares of Preferred Stock
computed using the above formula, provided that the application of such formula as of the Expiration Date yields a positive number
for “X”.

 

(c) For
purposes of Section 1(b), “Per Share Price” means:

 

(i) If
this Warrant is exercised on the date of Company’s initial public offering of Common Stock, and if Company’s registration
statement relating to such public offering has been declared effective by the Securities and Exchange Commission, then the Per
Share Price shall be the product of (A) the initial “Price to Public” of the Common Stock specified in the
final prospectus with respect to the offering, and (B) the number of shares of Common Stock into which each share of Preferred
Stock exercised is convertible at the date of calculation.

 

(ii) If
this Warrant is exercised after, and not on the date of Company’s initial public offering of Common Stock, and if Company’s
Common Stock is traded on a securities exchange or actively traded over-the-counter:

 

(1) If
Company’s Common Stock is traded on a securities exchange, the Per Share Price shall be deemed to be the product of (A)
the closing price of Company’s Common Stock as quoted on any exchange, as published in the Western Edition of The Wall Street
Journal for the trading day immediately prior to the date of Holder’s election hereunder and, (B) the number of shares of
Common Stock into which each share of Preferred Stock exercised is convertible on such date.

 

(2) If
Company’s Common Stock is actively traded over-the-counter, the Per Share Price shall be deemed to be the product of (A)
the closing bid or sales price, whichever is applicable, of Company’s Common Stock for the trading day immediately prior
to the date of the Holder’s election hereunder and (B) the number of shares of Common Stock into which each share of Preferred
Stock exercised is convertible on such date:

 

(iii) If
neither (i) nor (ii) is applicable, the Per Share Price shall be determined in good faith by the Board of Directors of Company
based on relevant facts and circumstances at the time of the net exercise under Section 1(b), including in the case of a Change
of Control (as defined in Section 4.3 hereof) the consideration receivable by the holders of the Preferred Stock in such Change
of Control and the liquidation preference (including any declared but unpaid dividends), if any, then applicable to the Preferred
Stock.

 

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2. Limitation
on Transfer.

 

(a) This
Warrant and the Preferred Stock shall not be transferable except upon the conditions specified in this Section 2, which conditions
are intended to ensure compliance with the provisions of the Securities Act. Each holder of this Warrant or the Preferred Stock
issuable hereunder will cause any proposed transferee of the Warrant or Preferred Stock to agree to take and hold such securities
subject to the provisions and upon the conditions specified in this Section 2. Notwithstanding the foregoing and any other provision
of this Section 2, Holder may freely transfer all or part of this Warrant or the shares issuable upon exercise of this Warrant
(or the securities issuable, directly or indirectly, upon conversion of the shares, if any) at any time to any lender transferee
of a portion of the loan commitment of Lender under the Loan Agreement, by giving Company notice of the portion of the Warrant
being transferred setting forth the name, address and taxpayer identification number of the transferee and surrendering this warrant
to Company for reissuance to the transferees(s) (and Holder, if applicable).

 

(b) Each
certificate representing (i) this Warrant, (ii) the Preferred Stock, (iii) shares of Company’s Common Stock issued upon
conversion of the Preferred Stock and (iv) any other securities issued in respect to the Preferred Stock or Common Stock issued
upon conversion of the Preferred Stock upon any stock split, stock dividend, recapitalization, merger, consolidation or similar
event, shall (unless otherwise permitted by the provisions of this Section 2 or unless such securities have been registered under
the Securities Act or sold under Rule 144) be stamped or otherwise imprinted with a legend substantially in the following form
(in addition to any legend required under applicable state securities laws):

 

THE
SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE
SALE AND DISTRIBUTION THEREOF, AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OR ANY STATE SECURITIES LAWS. SUCH SECURITIES
MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN OPINION OF COUNSEL IN A FORM REASONABLY ACCEPTABLE TO
THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED DUE TO AN EXEMPTION THEREFROM UNDER SAID ACT AND ANY APPLICABLE STATE SECURITIES
LAWS.

 

(c) Holder
of this Warrant and each person to whom this Warrant is subsequently transferred represents and warrants to Company (by acceptance
of such transfer) that it will not transfer this Warrant (or securities issuable upon exercise hereof unless a registration statement
under the Securities Act was in effect with respect to such securities at the time of issuance thereof) except pursuant to (i)
an effective registration statement under the Securities Act, (ii) Rule 144 under the Securities Act (or any other rule under
the Securities Act relating to the disposition of securities), or (iii) an opinion of counsel, reasonably satisfactory to counsel
for Company, that an exemption from such registration is available.

 

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3. Shares
to be Fully Paid; Reservation of Shares. Company covenants and agrees that all shares of Preferred Stock which may be issued
upon the exercise of the rights represented by this Warrant will, upon issuance, be duly authorized, validly issued, fully paid
and nonassessable and free from all preemptive rights of any stockholder and free of all taxes, liens and charges with respect
to the issue thereof. Company further covenants and agrees that during the period beginning on the date the Company first issues
Next Round Stock (unless otherwise requested by Holder in connection Holder’s exercise of this Warrant for shares of Series
B Preferred Stock), Company will at all times have authorized and reserved, for the purpose of issue or transfer upon exercise
of the subscription rights evidenced by this Warrant, a sufficient number of shares of authorized but unissued Preferred Stock,
or other securities and property, when and as required to provide for the exercise of the rights represented by this Warrant.
Company will take all such action as may be necessary to assure that such shares of Preferred Stock may be issued as provided
herein without violation of any applicable law or regulation, or of any requirements of any domestic securities exchange upon
which the Preferred Stock may be listed. Company will not take any action which would result in any adjustment of the Stock Purchase
Price (as described in Section 4 hereof) (i) if the total number of shares of Preferred Stock issuable after such action upon
exercise of all outstanding warrants, together with all shares of Preferred Stock then outstanding and all shares of Preferred
Stock then issuable upon exercise of all options and upon the conversion of all convertible securities then outstanding, would
exceed the total number of shares of Preferred Stock then authorized by Company’s Certificate of Incorporation, (ii) if
the total number of shares of Common Stock issuable after such action upon the conversion of all such shares of Preferred Stock
together with all shares of Common Stock then outstanding and then issuable upon exercise of all options and upon the conversion
of all convertible securities then outstanding would exceed the total number of shares of Common Stock then authorized by Company’s
Certificate of Incorporation or (iii) if the par value per share of the Preferred Stock would exceed the Stock Purchase Price.

 

4. Adjustment
of Stock Purchase Price and Number of Shares. The Stock Purchase Price and the number of shares purchasable upon the exercise
of this Warrant shall be subject to adjustment from time to time upon the occurrence of certain events described in this Section
4.

 

4.1 Subdivision
or Combination of Stock. In case Company shall at any time subdivide its outstanding shares of Preferred Stock into a greater
number of shares, the Stock Purchase Price in effect immediately prior to such subdivision shall be proportionately reduced, and
conversely, in case the outstanding shares of Preferred Stock of Company shall be combined into a smaller number of shares, the
Stock Purchase Price in effect immediately prior to such combination shall be proportionately increased.

 

4.2 Dividends
in Preferred Stock, Other Stock, Property, Reclassification. If at any time or from time to time the holders of Preferred
Stock (or any shares of stock or other securities at the time receivable upon the exercise of this Warrant) shall have received
or become entitled to receive, without payment therefor,

 

(a) Preferred
Stock, or any shares of stock or other securities whether or not such securities are at any time directly or indirectly convertible
into or exchangeable for Preferred Stock, or any rights or options to subscribe for, purchase or otherwise acquire any of the
foregoing by way of dividend or other distribution,

 

(b) any
cash paid or payable otherwise than as a cash dividend, or

 

(c) Preferred
Stock or other or additional stock or other securities or property (including cash) by way of spin off, split-up, reclassification,
combination of shares or similar corporate rearrangement, (other than shares of Preferred Stock issued as a stock split, adjustments
in respect of which shall be covered by the terms of Section 4.1 above), then and in each such case, Holder hereof shall, upon
the exercise of this Warrant, be entitled to receive, in addition to the number of shares of Preferred Stock receivable thereupon,
and without payment of any additional consideration therefore, the amount of stock and other securities and property (including
cash in the cases referred to in clauses (b) and (c) above) which such Holder would hold on the date of such exercise had it been
the holder of record of such Preferred Stock as of the date on which holders of Preferred Stock received or became entitled to
receive such shares and/or all other additional stock and other securities and property.

 

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4.3 Change
of Control or IPO. In the event of (i) a Change of Control (as hereinafter defined) or (ii) the consummation of a sale of
Company’s securities pursuant to a registration statement filed by Company under the Securities Act, in connection with
the first firm commitment underwritten offering of Company’s securities to the general public that occurs after the date
this Warrant is issued (“IPO”), this Warrant shall be automatically exchanged for a number of shares of Company’s
securities, such number of shares being equal to the maximum number of shares issuable pursuant to the terms hereof (after taking
into account all adjustments described herein) had Holder elected to exercise this Warrant immediately prior to the closing of
such Change of Control or IPO and purchased all such shares pursuant to the cash exercise provision set forth in Section 1(a)
hereof (as opposed to the cashless exercise provision set forth in Section 1(b)). Company acknowledges and agrees that Holder
shall only be required to make an additional payment for such shares in an amount as shall equal the aggregate par value, as determined
in accordance with the Company’s Charter (as defined below), with respect to the shares so issued; provided that such payment
shall be deemed to have been made pursuant to Section 1(b) of this Warrant using such par value as the “Stock Purchase
Price” solely for purposes of the calculation in Section 1(b). “Change of Control” shall mean any
sale, license, or other disposition of all or substantially all of the assets of Company, or any reorganization, consolidation,
or merger of Company where the holders of Company’s securities before the transaction beneficially own less than 50% of
the outstanding voting securities of the surviving entity after the transaction. This Warrant shall terminate upon Holder’s
receipt of the number of shares of Company’s equity securities described in this Section 4.3.

 

4.4 Sale
or Issuance Below Purchase Price; “Pay-to-Play” Exemption.

 

(a) The
other antidilution rights applicable to the shares of Preferred Stock purchasable hereunder as of the date hereof are set forth
in Company’s Certificate of Incorporation, as amended through the date hereof (the “Charter”). The antidilution
and other rights applicable to the shares of series Preferred Stock purchasable hereunder set forth in the Charter may be restated,
amended, modified or waived in any manner so long as such amendment, modification or waiver is effected consistent with the requirements
of the Charter and of the Delaware General Corporation Law, each as then in effect.

 

(b) In
the event that any “pay to play” terms or conditions (i.e. terms or conditions that require a holder of Company’s
Preferred Stock to purchase securities in a future round of equity or debt financing or else lose the benefit of antidilution
protection applicable to the shares of Preferred Stock issuable upon the exercise of this Warrant or have such shares of Preferred
Stock automatically convert to common stock or convert to another class and series of Company’s capital stock) in Company’s
Charter, as amended from time to time, or other agreement among the Company and its stockholders are triggered in connection with
the consummation of a Down Round (hereinafter defined) or otherwise after the date hereof, then in such event, this Warrant shall
automatically adjust to provide Holder with the same securities and/or rights that Holder would have received had Holder participated
in the Down Round to its full pro rata share with respect to the Preferred Stock issuable upon exercise of this Warrant (e.g.,
if this Warrant provides for the purchase of Series B Preferred Stock, and Company after the date hereof consummates a Down Round
in which those holders of Series B Preferred Stock who participate to their full pro rata share in such Down Round become entitled
to exchange such Series B Preferred Stock for Series B-1 Preferred Stock and those holders of Series B Preferred Stock who do
not participate to their full pro rata share will have their Series B Preferred Stock converted into Common Stock, then this Warrant
would automatically adjust to provide the right to purchase Series B-1 Preferred Stock instead of Common Stock). “Down
Round” means either (i) any non-public offering of securities of Company after the original date of issuance of this
Warrant at a price per share lower than the Stock Purchase Price then in effect, or (ii) any non-public offering of Company’s
debt securities after the original date of issuance of this Warrant which requires a holder of Company’s Preferred Stock
to purchase such debt securities or have such shares of Preferred Stock automatically convert to common stock or convert to another
class and series of Company’s capital stock.

 

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(c) If
in connection with a Down Round, the holders of a requisite percentage of shares of Preferred Stock waive any anti-dilution protections
that would otherwise have been available to such stockholders under the Charter on account of the issuance of securities in the
Down Round, Company shall afford Holder the opportunity to purchase up to that number of shares of equity securities of Company
to be sold through the Down Round as will enable Holder to own or acquire immediately after completion of the Down Round the same
percentage of the equity securities of Company (on a fully diluted basis) as Holder owned and/or had the right to purchase under
this Warrant immediately prior to commencement of the Down Round offering. In this regard, Company shall provide written notice
to Holder reasonably in advance of a proposed Down Round, which notice shall state, to the extent then known by Company, the number
and type of shares of equity securities proposed to be sold through the Down Round and the per share price, and shall establish
a deadline, not less than 20 days after the giving of such notice, by which Holder must deliver its written election to purchase
shares in the Down Round. The per share price payable by Holder in the Down Round shall be the same per share price payable by
the lead investor in the Down Round. If Company fails timely to afford Holder the opportunity to participate in the Down Round
in the foregoing manner, then Holder shall be entitled, upon conversion of the Preferred Stock issuable under this Warrant, to
the full benefit of any and all antidilution protections that were waived by the holders of Preferred Stock in connection with
the Down Round.

 

4.5 Notice
of Adjustment. Upon any adjustment of the Stock Purchase Price, and/or any increase or decrease in the number of shares purchasable
upon the exercise of this Warrant Company shall give written notice thereof, by first class mail, postage prepaid, addressed to
the registered holder of this Warrant at the address of such holder as shown on the books of Company. The notice, which may be
substantially in the form of Exhibit “A” attached hereto, shall be signed by Company’s chief financial
officer and shall state the Stock Purchase Price resulting from such adjustment and the increase or decrease, if any, in the number
of shares purchasable at such price upon the exercise of this Warrant, setting forth in reasonable detail the method of calculation
and the facts upon which such calculation is based.

 

4.6 Other
Notices. If at any time:

 

(a) Company
shall declare any cash dividend upon its Preferred Stock;

 

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(b) Company
shall declare any dividend upon its Preferred Stock payable in stock or make any special dividend or other distribution to the
holders of its Preferred Stock;

 

(c) Company
shall offer for subscription pro rata to the holders of its Preferred Stock any additional shares of stock in connection with
a Down Round or additional shares of stock of any class or other rights;

 

(d) there
shall be any capital reorganization or reclassification of the Preferred Stock of Company, or consolidation or merger of Company
with, or sale of all or substantially all of its assets to, another entity, which would result in the payment of a liquidation
preference to the holders of the Preferred Stock;

 

(e) there
shall be a voluntary or involuntary dissolution, liquidation or winding-up of Company; or

 

(f) Company
shall take or propose to take any other action, notice of which is actually provided to holders of the Preferred Stock;

 

then,
in any one or more of said cases, Company shall give, by first class mail, postage prepaid, addressed to Holder of this Warrant
at the address of such Holder as shown on the books of Company, (i) at least 20 days’ prior written notice (or such shorter
period as shall represent the amount of notice provided to the other holders of the Company’s Preferred Stock) of the date
on which the books of Company shall close or a record shall be taken for such dividend, distribution or subscription rights or
for determining rights to vote in respect of any such reorganization, reclassification, consolidation, merger, sale, dissolution,
liquidation or winding-up, or other action and (ii) in the case of any such reorganization, reclassification, consolidation, merger,
sale, dissolution, liquidation or winding-up, or other action, at least 20 days’ written notice (or such shorter period
as shall represent the amount of notice provided to the other holders of the Company’s Preferred Stock) of the date when
the same shall take place. Any notice given in accordance with the foregoing clause (i) shall also specify, in the case of any
such dividend, distribution or subscription rights, the date on which the holders of Preferred Stock shall be entitled thereto.
Any notice given in accordance with the foregoing clause (ii) shall also specify the date on which the holders of Preferred Stock
shall be entitled to exchange their Preferred Stock for securities or other property deliverable upon such reorganization, reclassification,
consolidation, merger, sale, dissolution, liquidation or winding-up, or other action as the case may be.

 

4.7 Certain
Events. If any change in the outstanding Preferred Stock of Company or any other event occurs as to which the other provisions
of this Section 4 are not strictly applicable or if strictly applicable would not fairly effect the adjustments to this Warrant
in accordance with the essential intent and principles of such provisions, then the Board of Directors of Company shall make in
good faith an adjustment in the number and class of shares issuable under this Warrant, the Stock Purchase Price and/or the application
of such provisions, in accordance with such essential intent and principles, so as to protect such purchase rights as aforesaid.
The adjustment shall be such as will give Holder of this Warrant upon exercise for the same aggregate Stock Purchase Price the
total number, class and kind of shares as Holder would have owned had this Warrant been exercised prior to the event and had Holder
continued to hold such shares until after the event requiring adjustment.

 

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5. Issue
Tax. The issuance of certificates for shares of Preferred Stock upon the exercise of this Warrant shall be made without charge
to Holder of this Warrant for any issue tax in respect thereof; provided, however, that Company shall not be required to pay any
tax which may be payable in respect of any transfer involved in the issuance and delivery of any certificate in a name other than
that of the then Holder of this Warrant being exercised.

 

6. Closing
of Books. Company will at no time close its transfer books against the transfer of this Warrant or of any shares of Preferred
Stock issued or issuable upon the exercise of this Warrant in any manner which interferes with the timely exercise of this Warrant.

 

7. No
Voting or Dividend Rights; Limitation of Liability. Nothing contained in this Warrant shall be construed as conferring upon
Holder hereof the right to vote or to consent as a stockholder in respect of meetings of stockholders for the election of directors
of Company or any other matters or any rights whatsoever as a stockholder of Company. No dividends or interest shall be payable
or accrued in respect of this Warrant or the interest represented hereby or the shares purchasable hereunder until, and only to
the extent that, this Warrant shall have been exercised. No provisions hereof, in the absence of affirmative action by Holder
to purchase shares of Preferred Stock, and no mere enumeration herein of the rights or privileges of Holder hereof, shall give
rise to any liability of such Holder for the Stock Purchase Price or as a stockholder of Company, whether such liability is asserted
by Company or by its creditors.

 

8. Intentionally
Omitted.

 

9. Registration
Rights. Upon execution of that certain First Amendment to Amended and Restated Investors’ Rights Agreement, dated as
of even date herewith, Holder hereof shall be entitled, with respect to the shares of Preferred Stock issued upon exercise hereof
or the shares of Common Stock or other securities issued upon conversion of such Preferred Stock as the case may be, to all of
the registration rights set forth in the Amended and Restated Investors’ Rights Agreement dated as of December 21, 2009
(the “Rights Agreement”), to the same extent and on the same terms and conditions as possessed by the investors
thereunder with the following exceptions and clarifications: (i) Holder will have no right to initiate a demand registration under
Section 1.3 of the Rights Agreement; (ii) Holder will be subject to the same provisions regarding indemnification as contained
in the Rights Agreement; and (iii) the registration rights are freely assignable by Holder of this Warrant in connection with
a permitted transfer of this Warrant or the shares issuable upon exercise hereof, so long as the transferee executes such amendment
to the Rights Agreement as shall be reasonably requested by the Company. Company shall take such action as may be reasonably necessary
to assure that the granting of such registration rights to Holder does not violate the provisions of the Rights Agreement or any
of Company’s charter documents or rights of prior grantees of registration rights.

 

10. Rights
and Obligations Survive Exercise of Warrant. The rights and obligations of Company, of Holder of this Warrant and of the holder
of shares of Preferred Stock issued upon exercise of this Warrant, contained in Sections 6 and 9 shall survive the exercise of
this Warrant.

 

11. Modification
and Waiver. This Warrant and any provision hereof may be changed, waived, discharged or terminated only by an instrument in
writing signed by the party against which enforcement of the same is sought.

 

    10

     

    

  

12. Notices.
Any notice, request or other document required or permitted to be given or delivered to Holder hereof or Company shall be deemed
to have been given (i) upon receipt if delivered personally or by courier (ii) upon confirmation of receipt if by telecopy or
(iii) three business days after deposit in the US mail, with postage prepaid and certified or registered, to each such Holder
at its address as shown on the books of Company or to Company at the address indicated therefor in the first paragraph of this
Warrant.

 

13. Binding
Effect on Successors. All of the obligations of Company relating to the Preferred Stock issuable upon the exercise of this
Warrant shall survive the exercise and termination of this Warrant. All of the covenants and agreements of Company shall inure
to the benefit of the successors and assigns of Holder hereof. Company will, at the time of the exercise of this Warrant, in whole
or in part, upon request of Holder hereof but at Company’s expense, acknowledge in writing its continuing obligation to
Holder hereof in respect of any rights (including, without limitation, any right to registration of the shares of Common Stock)
to which Holder hereof shall continue to be entitled after such exercise in accordance with this Warrant; provided, that the failure
of Holder hereof to make any such request shall not affect the continuing obligation of Company to Holder hereof in respect of
such rights.

 

14. Descriptive
Headings and Governing Law. The descriptive headings of the several sections and paragraphs of this Warrant are inserted for
convenience only and do not constitute a part of this Warrant. This Warrant shall be construed and enforced in accordance with,
and the rights of the parties shall be governed by, the laws of the State of California.

 

15. Lost
Warrants or Stock Certificates. Company represents and warrants to Holder hereof that upon receipt of evidence reasonably
satisfactory to Company of the loss, theft, destruction, or mutilation of any Warrant or stock certificate and, in the case of
any such loss, theft or destruction, upon receipt of an indemnity reasonably satisfactory to Company, or in the case of any such
mutilation upon surrender and cancellation of such Warrant or stock certificate, Company at its expense will make and deliver
a new Warrant or stock certificate, of like tenor, in lieu of the lost, stolen, destroyed or mutilated Warrant or stock certificate.

 

16. Fractional
Shares. No fractional shares shall be issued upon exercise of this Warrant. Company shall, in lieu of issuing any fractional
share, pay the holder entitled to such fraction a sum in cash equal to such fraction multiplied by the then effective Stock Purchase
Price.

 

17. Representations
of Holder. With respect to this Warrant, Holder represents and warrants to Company as follows:

 

17.1 Experience.
It is experienced in evaluating and investing in companies engaged in businesses similar to that of Company; it understands that
investment in this Warrant involves substantial risks; it has made detailed inquiries concerning Company, its business and services,
its officers and its personnel; the officers of Company have made available to Holder any and all written information it has requested;
the officers of Company have answered to Holder’s satisfaction all inquiries made by it; in making this investment it has
relied upon information made available to it by Company; and it has such knowledge and experience in financial and business matters
that it is capable of evaluating the merits and risks of investment in Company and it is able to bear the economic risk of that
investment.

 

    11

     

    

  

17.2 Investment.
It is acquiring this Warrant ‘for investment for its own account and not with a view to, or for resale in connection with,
any distribution thereof. It understands that this Warrant, the shares of Preferred Stock issuable upon exercise thereof and the
shares of Common Stock issuable upon conversion of the Preferred Stock, have not been registered under the Securities Act, nor
qualified under applicable state securities laws.

 

17.3 Rule
144. It acknowledges that this Warrant, the Preferred Stock and the Common Stock must be held indefinitely unless they are
subsequently registered under the Securities Act or an exemption from such registration is available. It has been advised or is
aware of the provisions of Rule 144 promulgated under the Securities Act.

 

17.4 Access
to Data. It has had an opportunity to discuss Company’s business, management and financial affairs with Company’s
management and has had the opportunity to inspect Company’s facilities.

 

17.5 Accredited
Investor. It is an “accredited investor” within the meaning of Regulation D promulgated under the Securities
Act.

 

18. Additional
Representations and Covenants of Company. Company hereby represents, warrants and agrees as follows:

 

18.1 Corporate
Power. Company has all requisite corporate power and corporate authority to issue this Warrant and to carry out and perform
its obligations hereunder.

 

18.2 Authorization.
All corporate action on the part of Company, its directors and stockholders necessary for the authorization, execution, delivery
and performance by Company of this Warrant has been taken. This Warrant is a valid and binding obligation of Company, enforceable
in accordance with its terms.

 

18.3 Offering.
Subject in part to the truth and accuracy of Holder’s representations set forth in Section 17 hereof, the offer, issuance
and sale of this Warrant is, and the issuance of Preferred Stock upon exercise of this Warrant and the issuance of Common Stock
upon conversion of the Preferred Stock will be exempt from the registration requirements of the Securities Act, and are exempt
from the qualification requirements of any applicable state securities laws; and neither Company nor anyone acting on its behalf
will take any action hereafter that would cause the loss of such exemptions.

 

18.4 Stock
Issuance. Upon exercise of this Warrant, Company will use its best efforts to cause stock certificates representing the shares
of Preferred Stock purchased pursuant to the exercise to be issued in the names of Holder, its nominees or assignees, as appropriate
at the time of such exercise. Upon conversion of the shares of Preferred Stock into shares of Common Stock, Company will issue
the Common Stock in the names of Holder, its nominees or assignees, as appropriate.

 

18.5 Certificates
and By-Laws. Company has provided Holder with true and complete copies of Company’s Certificate of Incorporation, By-Laws,
and each Certificate of Designation or other charter document setting, forth any rights, preferences and privileges of Company’s
capital stock, each as amended and in effect on the date of issuance of this Warrant.

 

    12

     

    

  

18.6 Conversion
of Preferred Stock. As of the date hereof, each share of the Preferred Stock is convertible into one share of the Common Stock.

 

18.7 Financial
and Other Reports. From time to time up to the earlier of the Expiration Date or the complete exercise of this Warrant, Company
shall furnish to Holder (i) upon delivery to Company’s Board of Directors a balance sheet and statement of changes in financial
position at and as of the end of each fiscal year, together with a statement of income for such fiscal year; provided, that such
financial statements shall be audited if so required by Company’s Board of Directors, but if no audit is required, such
financial statements shall be delivered unaudited; (ii) within 45 days after the close of each fiscal quarter of Company, an unaudited
balance sheet and statement of cash flows at and as of the end of such quarter, together with an unaudited statement of income
for such quarter and a capitalization table; and (iii) promptly after the closing of each equity financing consummated by Company
after the date this Warrant has been issued, a copy of the term sheet for such equity financing (if any), a post-closing capitalization
table and other information relating to the valuation of the Company. In addition, Company agrees to provide Holder at any time
and from time to time with such information as Holder may reasonably request for purposes of Holder’s compliance with regulatory,
accounting and reporting requirements applicable to Holder. Notwithstanding the foregoing, Company shall not be required to furnish
to Holder the financial information described in this Section 18.7 in the event such financial information has been previously
delivered to Lender pursuant to the Loan Agreement.

 

[Remainder
of this page intentionally left blank; signature page follows]

 

    13

     

    

 

IN
WITNESS WHEREOF, the Company has caused this Warrant to be duly executed by its officer, thereunto duly authorized as of the date
of issuance set forth on the first page hereof.

 

	 	COULOMB TECHNOLOGIES, INC.
	 	 	 
	 	By:	                  
	 	Name:	 
	 	Title:	 

 

 

    14

     

    

 

FORM
OF SUBSCRIPTION

 

(To
be signed only upon exercise of Warrant)

 

To:
_________________________

 

		☐	The
                                         undersigned, the holder of the within Warrant, hereby irrevocably elects to exercise
                                         the purchase right represented by such Warrant for, and to purchase thereunder, (1) See
                                         Below ____________________ (_____) shares (the “Shares”) of Stock of ____________________
                                         and herewith makes payment of _______________ Dollars ($__________) therefor, and requests
                                         that the certificates for such shares be issued in the name of, and delivered to, __________,
                                         whose address is ____________________.

 

		☐	The
                                         undersigned hereby elects to convert _____ percent (__%) of the value of the Warrant
                                         pursuant to the provisions of Section 1(b) of the Warrant.

 

The
undersigned acknowledges that it has reviewed the representations and warranties contained in Section 17 of this Warrant and by
its signature below hereby makes such representations and warranties to Company.

 

	 	Dated	 
	 	 	 
	 	Holder:	 
	 	 	 
	 	By:	 
	 	 	 
	 	Its:	 
	 	 	 
	 	(Address)	 
	 	 	 
	 	 	 
	 	 	 

 

		(1)	Insert
here the number of shares called for on the face of the Warrant (or, in the case of a partial exercise, the portion thereof as
to which the Warrant is being exercised), in either case without making any adjustment for additional Preferred Stock or any other
stock or other securities or property or cash which, pursuant to the adjustment provisions of the Warrant, may be issuable upon
exercise.

 

    15

     

    

 

ASSIGNMENT

 

FOR
VALUE RECEIVED, the undersigned, the holder of the within Warrant, hereby sells, assigns and transfers all of the rights of the
undersigned under the within Warrant, with respect to the number of shares of Preferred Stock covered thereby set forth herein
below, unto:

 

	Name
    of Assignee	 	Address	 	No.  of
    Shares
	 	 	 	 	 

 

	 	Dated	 
	 	 	 
	 	Holder:	 
	 	 	 
	 	By:	 
	 	 	 
	 	Its:	 

 

    16

     

    

 

EXHIBIT
“A”

 

[On
letterhead of Company] 

 

Reference
is hereby made to that certain Warrant dated June 29, 2010, issued by COULOMB TECHNOLOGIES, INC., a Delaware corporation (the
“Company”), to [ ] (the “Holder”).

 

[IF
APPLICABLE] The Warrant provides that the actual number and type of shares of Company’s capital stock issuable upon exercise
of the Warrant and the initial exercise price per share are to be determined by reference to one or more events or conditions
subsequent to the issuance of the Warrant. Such events or conditions have now occurred or lapsed, and Company wishes to confirm
the actual number of shares issuable and the initial exercise price. The provisions of this Supplement to Warrant are incorporated
into the Warrant by this reference, and shall control the interpretation and exercise of the Warrant.

 

[IF
APPLICABLE] Notice is hereby given pursuant to Section 4.5 of the Warrant that the following adjustment(s) have been made to the
Warrant: [describe adjustments, setting forth details regarding method of calculation and facts upon which calculation is based].

 

This
certifies that Holder is entitled to purchase from Company ____________________ (__________) fully paid and nonassessable shares
of Company’s _____ Stock at a price of _______________ Dollars ($__________) per share (the “Stock Purchase Price”).
The Stock Purchase Price and the number of shares purchasable under the Warrant remain subject to adjustment as provided in Section
4 of the Warrant.

 

Executed
this _____ day of _______________, 20_____.

 

	 	COULOMB TECHNOLOGIES, INC.
	 	 	 
	 	By:	                  
	 	 	 
	 	Name:	 
	 	 	 
	 	Title:	 

 

    17

     

    

 

Schedule
1

 

Example
1.

 

If:

 

		●	Borrowing
                                         Date of initial Loan is June 29, 2010.

		●	As
                                         of such Borrowing Date, the Current Round Stock consists of Company’s Series B
                                         Preferred Stock and the current Stock Purchase Price for Company’s Series B Preferred
                                         Stock is $0.2143.

		●	Amount
                                         of the Growth Capital Loan advanced on such Borrowing Date is $625,000.

 

then:

 

		●	Holder
                                         may opt to have the shares of Preferred Stock associated with such Growth Capital Loan
                                         be either the Current Round Stock (i.e., Company’s Series B Preferred Stock) or
                                         the Next Round Stock (i.e., Company’s Series C Preferred Stock).

		●	If
                                         Holder opts for such shares to be Series B Preferred Stock then the number of such shares
                                         will be 160,405 (($625,000 * 0.055) / $0.2143).

		●	If
                                         Holder opts for such shares to be Series C Preferred Stock then the number of such shares
                                         will be the number of obtained by dividing $34,375 (i.e., $625,000 * 0.055) by the lowest
                                         price per share at which Company most recently sold shares of its Series C Preferred
                                         Stock.

 

Example
2A.

 

If:

 

		●	Borrowing
                                         Date of the Loan funded under the Second Tranche of Lender’s Commitment is September
                                         30, 2010.

		●	As
                                         of such Borrowing Date, the Current Round Stock still consists of Company’s Series
                                         B Preferred Stock and the current Stock Purchase Price for Company’s Series B Preferred
                                         Stock remains $0.2143.

		●	Amount
                                         of the Growth Capital Loan advanced on such Borrowing Date is $750,000.

 

then:

 

		●	Holder
                                         may opt to have the shares of Preferred Stock associated with such Growth Capital Loan
                                         be either the Current Round Stock (i.e., Company’s Series B Preferred Stock) or
                                         the Next Round Stock (i.e., Company’s Series C Preferred Stock).

		●	If
                                         Holder opts for such shares to be Series B Preferred Stock then the number of such shares
                                         will be 192,487 (($750,000 * 0.055) / $0.2143)

		●	If
                                         Holder opts for such shares to be Series C Preferred Stock then the number of such shares
                                         will be the number of obtained by dividing $41,250 (i.e., $750,000 * 0.055) by the lowest
                                         price per share at which Company most recently sold shares of its Series C Preferred
                                         Stock.

 

    18

     

    

 

Example
2B.

 

If:

 

		●	Borrowing
                                         Date of the Loan funded under the Second Tranche of Lender’s Commitment is September
                                         30, 2010.

		●	As
                                         of such Borrowing Date, the Current Round Stock now consists of Company’s Series
                                         C Preferred Stock and the then-current Stock Purchase Price for Company’s Series
                                         C Preferred Stock is, for example, $0.50.

		●	Amount
                                         of the Growth Capital Loan advanced on such Borrowing Date is $750,000.

 

then:

 

		●	Holder
                                         may opt to have the shares of Preferred Stock associated with such Growth Capital Loan
                                         be either the Current Round Stock (i.e., Company’s Series C Preferred Stock) or
                                         the Next Round Stock (i.e., Company’s Series D Preferred Stock).

		●	If
                                         Holder opts for such shares to consist of Series C Preferred Stock then the number of
                                         such shares will be 82,500 (($750,000 * 0.055) / $0.50).

		●	If
                                         Holder opts for such shares to consist of Series D Preferred Stock then the number of
                                         such shares will be the number of obtained by dividing $41,250 (i.e., $750,000 * 0.055)
                                         by the lowest price per share at which Company most recently sold shares of its Series
                                         D Preferred Stock.

 

Example
3.

 

If:

 

		●	Borrowing
                                         Date of the Loan funded under the Third Tranche of Lender’s Commitment is April
                                         30, 2011.

		●	As
                                         of such Borrowing Date, the Current Round Stock consists of Company’s Series C
                                         Preferred Stock and the then-current Stock Purchase Price for Company’s Series
                                         C Preferred Stock is $0.50.

		●	Amount
                                         of the Growth Capital Loan advanced on such Borrowing Date is $625,000.

  

then:

 

		●	Holder
                                         may opt to have the shares of Preferred Stock associated with such Growth Capital Loan
                                         be either the Current Round Stock (i.e., Company’s Series C Preferred Stock) or
                                         the Next Round Stock (i.e., Company’s Series D Preferred Stock).

		●	If
                                         Holder opts for such shares to be Series C Preferred Stock then the number of such shares
                                         will be 68,750 (($625,000 * 0.055) / $0.50).

		●	If
                                         Holder opts for such shares to be Series D Preferred Stock then the number of such shares
                                         will be the number of obtained by dividing $34,375 (i.e., $625,000 * 0.055) by the lowest
                                         price per share at which Company most recently sold shares of its Series D Preferred
                                         Stock.

 

 

 19Exhibit
4.5

 

THIS
WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED.
THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, HYPOTHECATED, OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT REGISTRATION
IS NOT REQUIRED UNDER SUCH ACT OR UNLESS SOLD PURSUANT TO RULE 144 UNDER SUCH ACT. 

 

	Date
    of Issuance	 	Void
    after
	[   ],
    2011	 	[   ],
    2021

 

COULOMB
TECHNOLOGIES, INC.

WARRANT TO PURCHASE SHARES OF PREFERRED STOCK

 

For
the Purchase Price of Warrant stipulated in that certain Note and Warrant Purchase Agreement (the “Purchase Agreement”)
dated as of [   ], 2011, among the Company, Lender and certain other investors the receipt and sufficiency of which is hereby acknowledged,
this Warrant is issued to [   ] or its assigns (the “Holder”) by Coulomb Technologies, Inc., a Delaware corporation
(the “Company”). Capitalized terms not defined herein shall have the meaning set forth in the Purchase Agreement.

 

1. Purchase
of Shares.

 

(a) Number
of Warrant Shares. Subject to the terms and conditions set forth herein and set forth in the Purchase Agreement, the Holder
is entitled, upon surrender of this Warrant at the principal office of the Company (or at such other place as the Company shall
notify the Holder in writing), to purchase from the Company up to the number of fully paid and nonassessable Warrant Shares as
described in Section 3 of the Purchase Agreement (as adjusted pursuant to Section 6 hereof).

 

(b) Exercise
Price. The purchase price for the Warrant Shares issuable pursuant to this Section 1 shall be the exercise price described
in Section 3 of the Purchase Agreement. The Warrant Shares and the purchase price of such Warrant Shares shall be subject to adjustment
pursuant to Section 6 hereof. Such purchase price, as adjusted from time to time, is herein referred to as the “Exercise
Price.”

 

2. Exercise
Period. This Warrant shall be exercisable, in whole or in part, during the term commencing on the earlier of the closing of
the Next Equity Financing or the Maturity Date and ending at 5:00 p.m. PST on the date ten years after the Date of Issuance noted
above (the “Exercise Period”); provided, however, that this Warrant shall be exercisable immediately
prior to and contingent upon the closing of a Corporate Transaction prior to the earlier of a Next Equity Financing or the Maturity
Date; provided, further, however, that this Warrant shall no longer be exercisable and shall become null
and void upon the consummation of the issuance and sale of shares of common stock of the Company in the Company’s first
underwritten public offering pursuant to an effective registration statement under the Securities Act of 1933, as amended (the
“Initial Public Offering”). In the event of an Initial Public Offering, the Company shall notify the Holder at least
twenty (20) days prior to the consummation of such Initial Public Offering.

 

     

     

    

 

3. Method
of Exercise.

 

(a) While
this Warrant remains outstanding and exercisable in accordance with Section 2 above, the Holder may exercise, in whole or in part,
the purchase rights evidenced hereby. Such exercise shall be effected by:

 

(i) the
surrender of the Warrant, together with a duly executed copy of the Notice of Exercise attached hereto, to the Secretary of the
Company at its principal office (or at such other place as the Company shall notify the Holder in writing); and

 

(ii) the
payment to the Company of an amount equal to the aggregate Exercise Price for the number of Warrant Shares being purchased.

 

(b) Each
exercise of this Warrant shall be deemed to have been effected immediately prior to the close of business on the day on which
this Warrant is surrendered to the Company as provided in Section 3(a) above. At such time, the person or persons in whose name
or names any certificate for the Warrant Shares shall be issuable upon such exercise as provided in Section 3(c) below shall be
deemed to have become the holder or holders of record of the Warrant Shares represented by such certificate.

 

(c) As
soon as practicable after the exercise of this Warrant, in whole or in part, the Company at its expense will cause to be issued
in the name of, and delivered to, the Holder, or as such Holder (upon payment by such Holder of any applicable transfer taxes)
may direct:

 

(i) a
certificate or certificates for the number of Warrant Shares to which such Holder shall be entitled, and

 

(ii) in
case such exercise is in part only, a new warrant or warrants (dated the date hereof) of like tenor, calling in the aggregate
on the face or faces thereof for the number of Warrant Shares equal to the number of such Warrant Shares called for on the face
of this Warrant minus the number of Warrant Shares purchased by the Holder upon all exercises made in accordance with Section
3(a) above or Section 4 below.

 

4. Net
Exercise. In lieu of exercising this Warrant for cash, the Holder may elect to receive shares equal to the value of this Warrant
(or the portion thereof being exercised) by surrender of this Warrant at the principal office of the Company together with notice
of such election (a “Net Exercise”). A Holder who Net Exercises shall have the rights described in Sections 3(b) and
3(c) hereof, and the Company shall issue to such Holder a number of Warrant Shares computed using the following formula:

 

	 	X = 	Y(A – B)	 
	 	A	 

  

		Where	

 

		X
                                         =	The
                                         number of Warrant Shares to be issued to the Holder.

 

    2

     

    

 

		Y
                                         =	The
                                         number of Warrant Shares purchasable under this Warrant or, if only a portion of the
                                         Warrant is being exercised, the portion of the Warrant being cancelled (at the date of
                                         such calculation).

 

		A
                                         =	The
                                         fair market value of one (1) Warrant Share (at the date of such calculation).

 

		B
                                         =	The
                                         Exercise Price (as adjusted to the date of such calculations).

 

For
purposes of this Section 4, the fair market value of a Warrant Share shall mean the average of the closing price of the Warrant
Shares (or equivalent shares of Common Stock underlying the Warrant Shares) quoted in the over-the-counter market in which the
Warrant Shares (or equivalent shares of Common Stock underlying the Warrant Shares) are traded or the closing price quoted on
any exchange or electronic securities market on which the Warrant Shares (or equivalent shares of Common Stock underlying the
Warrants) are listed, whichever is applicable, as published in The Wall Street Journal for the thirty (30) trading days
prior to the date of determination of fair market value (or such shorter period of time during which such Warrant Shares were
traded over-the-counter or on such exchange). In the event that this Warrant is exercised pursuant to this Section 4 in connection
with the Company’s Initial Public Offering, the fair market value per Warrant Share shall be the product of (a) the per
share offering price to the public of the Company’s Initial Public Offering, and (b) the number of shares of Common Stock
into which each Warrant Share is convertible at the time of such exercise or, if the Warrant Shares are shares of Common Stock,
one. If the Warrant Shares are not traded on the over-the-counter market, an exchange or an electronic securities market, the
fair market value shall be the price per Warrant Share that the Company could obtain from a willing buyer for Warrant Shares sold
by the Company from authorized but unissued Warrant Shares, as such prices shall be determined in good faith by the Company’s
Board of Directors.

 

5. Covenants
of the Company.

 

(a) Notices
of Record Date. In the event of any taking by the Company of a record of the holders of any class of securities for the purpose
of determining the holders thereof who are entitled to receive any dividend (other than a cash dividend which is the same as cash
dividends paid in previous quarters or a stock dividend) or other distribution, the Company shall mail to the Holder, at least
ten (10) days prior to such record date, a notice specifying the date on which any such record is to be taken for the purpose
of such dividend or distribution.

 

(b) Covenants
as to Exercise Shares. The Company covenants and agrees that all Warrant Shares that may be issued upon the exercise of the
rights represented by this Warrant will, upon issuance in accordance with the terms hereof, be validly issued and outstanding,
fully paid and nonassessable, and free from all taxes, liens and charges with respect to the issuance thereof The Company further
covenants and agrees that the Company will at all times during the Exercise Period have authorized and reserved, free from preemptive
rights, a sufficient number of shares of its Preferred Stock and Common Stock to provide for the exercise of the rights represented
by this Warrant. If at any time during the Exercise Period the number of authorized but unissued shares of Preferred Stock and
Common Stock shall not be sufficient to permit exercise of this Warrant, the Company will take such corporate action as may, in
the opinion of its counsel, be necessary to increase its authorized but unissued shares of Preferred Stock and Common Stock to
such number of shares as shall be sufficient for such purposes.

 

    3

     

    

  

6. Adjustment
of Exercise Price and Number of Warrant Shares. The number and kind of Warrant Shares purchasable upon exercise of this Warrant
and the Exercise Price shall be subject to adjustment from time to time as follows:

 

(a) Subdivisions,
Combinations and Other Issuances. If the Company shall at any time after the issuance but prior to the expiration of this
Warrant subdivide its Preferred Stock, by split-up or otherwise, or combine its Preferred Stock, or issue additional shares of
its Preferred Stock or Common Stock as a dividend with respect to any shares of its Preferred Stock, the number of Warrant Shares
issuable on the exercise of this Warrant shall forthwith be proportionately increased in the case of a subdivision or stock dividend,
or proportionately decreased in the case of a combination. Appropriate adjustments shall also be made to the Exercise Price payable
per share, but the aggregate Exercise Price payable for the total number of Warrant Shares purchasable under this Warrant (as
adjusted) shall remain the same. Any adjustment under this Section 6(a) shall become effective at the close of business on the
date the subdivision or combination becomes effective, or as of the record date of such dividend, or in the event that no record
date is fixed, upon the making of such dividend.

 

(b) Reclassification,
Reorganization and Consolidation. In case of any reclassification, capital reorganization or change in the capital stock of
the Company (other than as a result of a subdivision, combination or stock dividend provided for in Section 6(a) above), then,
as a condition of such reclassification, reorganization or change, lawful provision shall be made, and duly executed documents
evidencing the same from the Company or its successor shall be delivered to the Holder, so that the Holder shall have the right
at any time prior to the expiration of this Warrant to purchase, at a total price equal to that payable upon the exercise of this
Warrant, the kind and amount of shares of stock and other securities or property receivable in connection with such reclassification,
reorganization or change by a holder of the same number and type of securities as were purchasable as Warrant Shares by the Holder
immediately prior to such reclassification, reorganization or change. In any such case appropriate provisions shall be made with
respect to the rights and interest of the Holder so that the provisions hereof shall thereafter be applicable with respect to
any shares of stock or other securities or property deliverable upon exercise hereof, and appropriate adjustments shall be made
to the Exercise Price per Warrant Share payable hereunder, provided the aggregate Exercise Price shall remain the same.

 

(c) Notice
of Adjustment. When any adjustment is required to be made in the number or kind of shares purchasable upon exercise of the
Warrant, or in the Exercise Price, the Company shall promptly notify the Holder of such event and of the number of Warrant Shares
or other securities or property thereafter purchasable upon exercise of this Warrant.

 

7. No
Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise
of this Warrant, but in lieu of such fractional shares the Company shall make a cash payment therefor on the basis of the Exercise
Price then in effect.

 

    4

     

    

  

8. No
Stockholder Rights. Prior to exercise of this Warrant, the Holder shall not be entitled to any rights of a stockholder with
respect to the Warrant Shares, including (without limitation) the right to vote such Warrant Shares, receive dividends or other
distributions thereon, exercise preemptive rights or be notified of stockholder meetings, and except as otherwise provided in
this Warrant or the Purchase Agreement, such Holder shall not be entitled to any stockholder notice or other communication concerning
the business or affairs of the Company.

 

9. Governing
Law. This Warrant shall be governed by and construed under the laws of the State of California as applied to agreements among
California residents, made and to be performed entirely within the State of California.

 

10. Successors
and Assigns. The terms and provisions of this Warrant and the Purchase Agreement shall inure to the benefit of, and be binding
upon, the Company and the holders hereof and their respective successors and assigns.

 

11. Titles
and Subtitles. The titles and subtitles used in this Warrant are used for convenience only and are not to be considered in
construing or interpreting this Warrant.

 

12. Notices.
All notices and other communications given or made pursuant hereto shall be in writing and shall be deemed effectively given:
(a) upon personal delivery to

the party to be notified, (b) when sent by confirmed electronic mail or facsimile if sent during normal business hours of the
recipient, and if not so confirmed, then on the next business day, (c) five (5) days after having been sent by registered or certified
mail, return receipt requested, postage prepaid, or (d) one (1) day after deposit with a nationally recognized overnight courier,
specifying next day delivery, with written verification of receipt. All communications shall be sent to the respective parties
at the following addresses (or at such other addresses as shall be specified by notice given in accordance with this Section 12):

 

If
to the Company:

 

COULOMB
TECHNOLOGIES, INC.

1692
Dell Avenue

Campbell,
CA 95008-6901

Attention:
Chief Financial Officer

 

If
to Holders:

 

At
the addresses shown on the signature pages hereto.

 

13. Assumption
of Warrant. If at any time while this Warrant, or any portion thereof, is outstanding and unexpired there shall be a Corporate
Transaction, then, as a part of such transaction, lawful provision shall be made so that the Holder shall thereafter be entitled
to receive upon exercise of this Warrant, during the period specified herein and upon payment of the Exercise Price then in effect,
the number of shares of stock or other securities or property of the successor corporation resulting from the Corporate Transaction
which a holder of the shares deliverable upon exercise of this Warrant would have been entitled to receive in such Corporate Transaction
if this Warrant had been exercised immediately before such Corporate Transaction, all subject to further adjustment as provided
in this Section 13; and, in any such case, appropriate adjustment (as determined by the Company’s Board of Directors) shall
be made in the application of the provisions herein set forth with respect to the rights and interests thereafter of the Holder
to the end that the provisions set forth herein (including provisions with respect to changes in and other adjustments of the
number of Warrant Shares the Holder is entitled to purchase) shall thereafter be applicable, as nearly as possible, in relation
to any shares of Preferred Stock or other securities or other property thereafter deliverable upon the exercise of this Warrant.

 

    5

     

    

  

14. Amendments
and Waivers; Resolutions of Dispute; Notice. The amendment or waiver of any term of this Warrant, the resolution of any controversy
or claim arising out of or relating to this Warrant and the provision of notice shall be conducted pursuant to the terms of the
Purchase Agreement.

 

15. Severability.
If any provision of this Warrant is held to be unenforceable under applicable law, such provision shall be excluded from this
Warrant and the balance of the Warrant shall be interpreted as if such provision were so excluded and shall be enforceable in
accordance with its terms.

 

    6

     

    

  

IN
WITNESS WHEREOF, the parties have executed this Warrant as of the date first written above.

 

	 	COULOMB TECHNOLOGIES, INC.
	 	 	 
	 	By:	 
	 	 	Pasquale
    Romano
	 	 	President
    and Chief Executive Officer

 

	ACKNOWLEDGED AND AGREED:	 
	 	 	 
	HOLDER	 
	 	 	 
	[   ]	 
	 	 	 
	By:	       	 
	Print
    Name:  	 	 
	Title:	 	 

 

     

     

    

 

NOTICE
OF EXERCISE

 

COULOMB
TECHNOLOGIES, INC.

Attention:
Corporate Secretary

 

The
undersigned hereby elects to purchase, pursuant to the provisions of the Warrant, as follows:

 

		☐	_____________
                                         shares of Preferred Stock pursuant to the terms of the attached Warrant, and tenders
                                         herewith payment in cash of the Exercise Price of such Warrant Shares in full, together
                                         with all applicable transfer taxes, if any.

 

		☐	Net
                                         Exercise the attached Warrant with respect to __________ Warrant Shares.

 

The
undersigned hereby represents and warrants that Representations and Warranties in Section 6 of the Purchase Agreement are
true and correct as of the date hereof.

 

	 	 	 	HOLDER:
	 	 	 	 	 
	Date:	 	 	By:	                     

 

		Address: 	 
	 	 	 
	 	 	 

 

	Name
    in which shares should be registered:	 
	 	 
	 	 

 

     

     

    

 

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)

 

Dated:
_________________

 

	Holder’s	 	 
	Signature:	 	 
	 	 	 
	Holder’s	 	 
	Address:	 	 

 

NOTE:
The signature to this Assignment Form must correspond with the name as it appears on the face of the Warrant. Officers of corporations
and those acting in a fiduciary or other representative capacity should provide proper evidence of authority to assign the foregoing
Warrant.

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