Document:

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                                EXHIBIT 10.1

THIS SUBORDINATED PROMISSORY NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE "ACT") OR ANY STATE OR FOREIGN SECURITIES OR BLUE
SKY LAWS. THIS SUBORDINATED PROMISSORY NOTE MAY NOT BE SOLD, OFFERED FOR SALE,
PLEDGED OR HYPOTHECATED IN THE ABSENCE OF A REGISTRATION STATEMENT IN EFFECT
WITH RESPECT TO THE SECURITIES UNDER THE ACT OR AN OPINION OF COUNSEL
SATISFACTORY TO THE ISSUER THAT REGISTRATION UNDER THE ACT OR ANY STATE OR
FOREIGN SECURITIES OR BLUE SKY LAWS IS NOT REQUIRED OR UNLESS SOLD PURSUANT TO
RULE 144 OF THE ACT.

                    SUBORDINATED CONVERTIBLE PROMISSORY NOTE

$481,706.27                                                  December 24, 2001

         FOR VALUE RECEIVED, the undersigned, Inprimis, Inc., a Florida
corporation (the "MAKER"), hereby promises to pay to Ener1 Holdings, Inc. (the
"HOLDER"), or its registered assigns, the principal sum of Four Hundred
Eighty-One Thousand Seven Hundred Six and 27/100 Dollars ($481,706.27), with no
interest, at the address of Holder as set forth in this Note, or at such other
place as from time to time may be designated by the Holder of this Note.

         1. MATURITY DATE. All unpaid principal balance of this Note shall be
due and payable in a single installment on July 1, 2002 or thereafter if
extended by Holder (the "MATURITY DATE"). If the unpaid principal is not paid as
of the Maturity Date, the unpaid balance shall automatically and without further
action convert into fully paid and nonassessable shares of common stock of
Maker, par value $0.01 per share ("COMMON STOCK") as set forth in Section 4
below.

         2. DEFAULT. If Maker becomes insolvent or is the subject of a voluntary
or involuntary proceeding in bankruptcy not dismissed within 30 days, or a
reorganization, arrangement or creditor composition proceeding, ceases doing
business as a going concern, or is the subject of a dissolution, then the
principal balance hereof shall automatically and without further action convert
into fully paid and nonassessable shares of Common Stock as set forth in Section
4 below.

         3. PREPAYMENT. Maker shall have the right to prepay without premium or
penalty at any time and from time to time prior to maturity, all or any part of
the unpaid principal balance of this Note, but only by converting such principal
balance into Common Stock on the terms set forth in Section 4(b) - (d) hereof.

         4. CONVERSION.

             (a) Upon the earlier to occur of (i) the approval of the Share
Increase (as such term is defined in the Securities Purchase Agreement between
the Holder and the Maker of even date herewith) and (ii) the Maturity Date, any
unpaid principal balance shall, without any further action of Holder or Maker,
be automatically converted into shares of Common Stock. The number of shares of

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Common Stock into which this Note shall or may be converted (the "CONVERSION
SHARES") shall be determined by dividing the aggregate unpaid principal amount
of this Note by the Conversion Price (as defined below) in effect at the time of
such conversion.

             (b) The "CONVERSION PRICE" shall be $.0254634 per share, as
adjusted pursuant to Section 5 below.

             (c) As promptly as practicable after the conversion of this Note,
Maker at its expense will issue and deliver to the Holder a certificate or
certificates for the number of full shares of Common Stock issuable upon such
conversion (bearing such legends as are required by applicable state and federal
securities laws in the opinion of counsel to Maker).

             (d) No fractional shares of Common Stock shall be issued upon
conversion of this Note. In lieu of Maker issuing any fractional shares to the
Holder upon the conversion of this Note, Maker shall pay to the Holder the
amount of outstanding principal that is not so converted calculated on a
$0.0254634 per share basis, such payment to be made, at the Holder's discretion,
by check or wire transfer of immediately available funds.

             (e) If the Company is ever required to repay this Note in cash,
then the principal amount otherwise payable under this Note shall be reduced by
the amount that results from multiplying the Applicable Holdback Fraction by
$48,170.66. As used herein, the term "APPLICABLE HOLDBACK FRACTION" shall mean a
fraction, the numerator of which is the amount that is the portion of the
Holdback Amount (as defined in the Securities Purchase Agreement, dated December
21, 2001, between Maker and Holder) that is not ultimately paid to the Company,
and the denominator of which is the Holdback Amount.

             (f) In the event that, upon the Maturity Date the Maker does not
have available out of its authorized but unissued shares of Common Stock a
sufficient number of shares to effect the conversion of any portion of the then
outstanding principal balance of the Note, then the portion of the principal
balance that is not discharged by conversion into Common Stock as provided above
shall be paid to the Holder by wire transfer of immediately available funds.

         5. CONVERSION PRICE ADJUSTMENTS.

             (a) In the event Maker should at any time or from time to time
after the date of issuance hereof fix a record date for the effectuation of a
split or subdivision of the outstanding shares of Common Stock or the
determination of holders of Common Stock entitled to receive a dividend or other
distribution payable in additional shares of Common Stock or securities or
rights convertible into, or entitling the holder thereof to receive directly or
indirectly, shares of Common Stock (hereinafter referred to as "COMMON SHARE
EQUIVALENT") without payment of any consideration by such holder for the
additional shares of Common Stock or the Common Stock Equivalents (including the
additional shares of Common Stock issuable upon conversion or exercise thereof),
then, as of such record date (or the date of such dividend distribution, split
or subdivision if no record date is fixed), the Conversion Price of this Note
shall be appropriately decreased so that the number of shares of Common Stock
issuable upon conversion of this Note shall be increased in proportion to such
increase of outstanding shares.

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             (b) If the number of shares of Common Stock outstanding at any time
after the date hereof is decreased by a combination of the outstanding shares of
Common Stock or a consolidation, by reclassification or otherwise, then,
following the record date of such combination, the Conversion Price for this
Note shall be appropriately increased so that the number of shares of Common
Stock issuable on conversion hereof shall be decreased in proportion to such
decrease in outstanding shares.

             (c) If the Common Stock issuable on conversion of this Note shall
be changed into the same or a different number of shares of any other class or
classes of stock, whether by capital reorganization, reclassification or
otherwise (other than a stock split, subdivision or combination of shares
provided for above), the Holder shall, upon the conversion of this Note, be
entitled to receive, in lieu of the Common Stock which the Holder would have
become entitled to receive but for such change, a number of shares of such other
class or classes of stock equivalent to the number of shares of Common Stock
that Holder would have been entitled to on conversion of this Note immediately
prior to such change.

             (d) Holder acknowledges that Maker does not currently have reserved
and made available out of its authorized but unissued shares of Common Stock a
sufficient number of shares to effect the conversion of any of the principal
balance of the Note.

             (e) Upon the occurrence of each adjustment of the Conversion Price
pursuant to this Section 5, Maker at its expense shall promptly compute such
adjustment in accordance with the terms hereof and, promptly upon Holder's
written request, provide to the Holder a certificate setting forth such
adjustment and showing in reasonable detail the facts upon which such adjustment
is based.

             (f) The form of this Note need not be changed because of any
adjustment in the Conversion Price.

             (g) Maker will not, by amendment of its Articles 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 to be observed
or performed hereunder by Maker, but will at all times in good faith assist in
the carrying out of all the provisions of this Section 5 and in the taking of
all such action as may be necessary or appropriate in order to protect against
impairment of the rights of the Holder of this Note set forth in this Section 5.

         6. REPRESENTATIONS AND WARRANTIES OF HOLDER.

             (a) The Holder represents and warrants to the Maker that it (i) has
had the opportunity to conduct a due diligence investigation concerning the
Maker's business operations, financial affairs and prospects and the terms and
conditions of this Promissory Note, (ii) believes it has received all the
information it considers necessary or appropriate for deciding whether to enter
into the transactions contemplated by this Promissory Note, (y) has examined and
reviewed all recent filings of the Maker with the United States Securities and
Exchange Commission on Forms 10-Q and 10-K, respectively, and (z) has evaluated
the risk factors inherent in this Promissory Note and an investment in the

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Conversion Shares. Holder is an investor in securities of companies in the
development stage and acknowledges that it is able to fend for itself, can bear
the economic risk of its investment and has such knowledge and experience in
financial and business matters that it is capable of evaluating the merits and
risks of this Promissory Note and an investment in the Conversion Shares. The
Holder also represents it has not been organized for the purpose of entering
into this Promissory Note or acquiring the Conversion Shares. The Holder further
represents and warrants that it has full power and authority to enter into this
Agreement, and this Agreement constitutes its valid and legally binding
obligation, enforceable in accordance with its terms.

             (b) The Holder understands that the Conversion Shares will not be
registered under the Act or under under any state securities act, that the
Conversion Shares are "restricted" securities within the meaning of the Act and
that they may not be sold or traded in the absence of a registration statement
or opinion of counsel reasonably acceptable to the Maker that any such sale is
exempt from registration requirements. In this connection, the Holder represents
that it is familiar with SEC Rule 144, as presently in effect, and understands
the resale limitations imposed thereby and by the Act.

         It is understood that the certificates evidencing the Conversion Shares
may bear the following legend:

         "THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "ACT") OR ANY STATE OR FOREIGN SECURITIES OR BLUE SKY
LAWS. THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE
ABSENCE OF A REGISTRATION STATEMENT IN EFFECT WITH RESPECT TO THE SECURITIES
UNDER SUCH ACT OR AN OPINION OF COUNSEL SATISFACTORY TO THE ISSUER THAT
REGISTRATION UNDER THE ACT OR ANY STATE OR FOREIGN SECURITIES OR BLUE SKY LAWS
IS NOT REQUIRED OR UNLESS SOLD PURSUANT TO RULE 144 OF THE ACT."

         "THESE SECURITIES ARE SUBJECT TO A SECURITIES PURCHASE AGREEMENT DATED
DECEMBER 21, 2001 BETWEEN THE ISSUER AND CERTAIN OF ITS SHAREHOLDERS. COPIES OF
SUCH AGREEMENT MAY BE OBTAINED FROM THE ISSUER AT ITS PRINCIPAL EXECUTIVE
OFFICES."

             (c) The Holder represents and warrants to the Maker that it is
entering into this Promissory Note, and that it will acquire any Conversion
Shares acquired hereunder, for its own account for purposes of investment and
not with any present intent to effect a distribution in the same.

         7. ASSIGNMENT. Subject to the restrictions on transfer described in
Section 8, the rights and obligations of Maker and the Holder of this Note shall
be binding upon and benefit the successors, permitted assigns, heirs,
administrators and permitted transferees of the parties.

         8. NO STOCKHOLDER RIGHTS. Nothing contained in this Note shall be
construed as conferring upon the Holder or any other person the right to vote or
to consent or to receive notice as a stockholder in respect of meetings of
stockholders for the election of directors of Maker or any other matters or any
rights whatsoever as a stockholder of Maker; and no dividends or interest shall

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be payable or accrued in respect of this Note or the interest represented hereby
or any shares of Common Stock obtainable hereunder until, and only to the extent
that, this Note shall have been converted.

         9. INTEREST. If, notwithstanding that this Note by its terms bears no
interest, any payment to Holder is construed as interest, then, anything herein
to the contrary notwithstanding, the obligations of the Maker under this Note
shall be subject to the limitation that any payments hereunder which are
construed as payments of interest to the Holder shall not be required to the
extent that receipt of any such payment by the Holder would be contrary to
provisions of law applicable to the Holder (if any) which limit the maximum rate
of interest which may be charged or collected by the Holder; PROVIDED, HOWEVER,
that nothing herein shall be construed to limit the Holder to presently existing
maximum rates of interest, if an increased interest rate is hereafter permitted
by reason of applicable federal or state legislation. In the event that the
Maker makes any payment which is construed to be a payment of interest, fees or
other charges, however denominated, pursuant to this Note, which payment results
in the interest paid to the Holder to exceed the maximum rate of interest
permitted by applicable law, any excess over such maximum shall be applied in
reduction of the principal balance owed to the Holder as of the date of such
payment, or if such excess exceeds the amount of principal owed to the Holder as
of the date of such payment, the difference shall be paid by the Holder to the
Maker.

         10. WAIVERS. Maker hereby waives presentment for payment, demand,
notice of demand and of dishonor and nonpayment of this Note, notice of
intention to accelerate the maturity of this Note, protest and notice of
protest, diligence in collecting, and the bringing of suit against any other
party, and agrees to all renewals, extensions, modifications, partial payments,
releases or substitutions of security, in whole or in part, with or without
notice, before or after maturity.

         11. NOTICES. Any notice, request, instruction or other document to be
given under this Note after the date hereof by any party hereto to any other
party shall be in writing and shall be deemed to have been duly given on the
date of service if delivered personally or by telecopier with confirmed receipt,
or on the third day after mailing if sent by certified mail, postage prepaid, at
the addresses set forth below:

         If to Maker:    Inprimis, Inc.
                         1601 Clint Moore Rd.
                         Boca Raton, Florida 33433
                         Attn: Eduard Will
                         Fax:  561.241.1051

                         With a copy to:

                         Kenneth E. Adelsberg, Esq.
                         Pillsbury Winthrop LLP
                         One Battery Park Plaza
                         New York, New York 10004-1490
                         Fax: 212.858.1500

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                         If to Holder:

                         Ener1 Holdings, Inc.
                         500 W Cypress Creek Rd.   Suite 770
                         Fort Lauderdale Fl  33309
                         Attn:  Chief Executive Officer
                         Fax: 954.202.2884

                         With a copy to:

                         Robert C. Boehm, Esq.
                         Ackerman, Senterfitt & Eidson, P.A.
                         One Southeast Third Avenue, 28th Floor
                         SunTrust International Center
                         Miami, Florida 33131
                         Fax:  205.374.5095

Any change in the address of any party hereunder shall not be effective as to
the other party unless notice of such change of address is sent to the other
party in accordance with the foregoing.

         12. AMENDMENTS AND WAIVERS. Any provision of this Note may be amended,
supplemented, waived, discharged or terminated only by a written instrument
signed by Maker and the Holder hereof.

         13. DELAYS AND OMISSIONS. No delay or omission of Holder or any other
holder hereof to exercise any power, right or remedy accruing to Holder or any
other holder hereof shall impair any such power, right or remedy or shall be
construed to be a waiver of the right to exercise any such power, right or
remedy.

         14. BINDING EFFECT. This Note and all the covenants and agreements
contained herein shall be binding upon, and shall inure to the benefit of, the
respective legal representatives, heirs, successors and permitted assigns of
Maker and Holder.

         15. HEADINGS; PRONOUNS. All pronouns and any variations thereof shall
be deemed to refer to the masculine, feminine, neuter, singular or plural, as
the identity of the entities or persons referred may require. The headings of
the sections of this Note are inserted for convenience only and shall not
constitute a part hereof nor affect in any way the meaning or interpretation of
this Note. "Herein," "hereof" and "hereunder" and other words of similar import
refer to this Note as a whole and not to any particular section or other
subdivision.

         16. SEVERABILITY. If any provision of this Note is held to be illegal,
invalid or unenforceable under present or future laws, the legality, validity
and enforceability of the remaining provisions of this Note shall not be
affected thereby, and this Note shall be liberally construed so as to carry out
the intent of the parties to it.

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         17. MISCELLANEOUS.

         THIS NOTE AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL
IN ALL RESPECTS BE GOVERNED BY, AND CONSTRUED AND ENFORCED IN ACCORDANCE WITH,
THE LAWS OF THE STATE OF FLORIDA, WITHOUT REGARD TO THE CONFLICTS OF LAWS
PROVISIONS THEREOF, AND THE LAWS OF THE UNITED STATES APPLICABLE TO TRANSACTIONS
IN SUCH STATE.

         THIS NOTE AND ALL OTHER DOCUMENTS EXECUTED BY ANY OF THE PARTIES
SUBSTANTIALLY CONCURRENTLY HEREWITH TOGETHER CONSTITUTE A WRITTEN LOAN AGREEMENT
WHICH REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS
OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

         21. SUBORDINATION. THE HOLDER AGREES THAT THE DEBT EVIDENCED BY THIS
SUBORDINATED PROMISSORY NOTE SHALL AT ALL TIMES AND IN ALL RESPECTS BE
SUBORDINATED AND JUNIOR IN RIGHT OF PAYMENT TO ALL DEBTS AND OBLIGATIONS OF THE
MAKER.

                      [the next page is the execution page]

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         IN WITNESS WHEREOF, this Note has been executed and delivered as of the
date first above written.

                                        MAKER:

                                        INPRIMIS, INC.

                                        By:  /s/ Eduard Will
                                            -----------------------------------
                                        Its: Chief Executive Officer
                                            -----------------------------------

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                                 EXHIBIT 10.2

                               ESCROW AGREEMENT

         THIS ESCROW AGREEMENT (this "AGREEMENT") is made on December 24, 2001
by and among INPRIMIS, INC. a Florida corporation (the "COMPANY"), ENER1
HOLDINGS, INC., a Florida corporation (the "BUYER"), and AKERMAN, SENTERFITT &
EIDSON, P.A. (the "ESCROW AGENT"). Each of the Company, the Buyer, and the
Escrow Agent is referred to sometimes herein, individually, as a "PARTY" and,
collectively, as the "PARTIES." Capitalized terms used herein but not defined
herein shall have the meanings ascribed to such terms in the Securities Purchase
Agreement (as defined below).

                                   RECITALS

         A. The Company and the Buyer are parties to that certain Securities
Purchase Agreement dated as of the date hereof (the "SECURITIES PURCHASE
AGREEMENT").

         B. Pursuant to the terms of the Securities Purchase Agreement, the
Purchase Price in its entirety shall be held in escrow pursuant to the terms
hereof.

         C. Pursuant to the terms of the Securities Purchase Agreement, $120,000
of the Purchase Price along with interest and dividends and other investment
returns accruing thereon subsequent to deposit with the Escrow Agent (the
"INDEMNITY ESCROW FUNDS"), shall be held in escrow as provided herein as
security against which the Buyer may set off and recoup any Indemnifiable
Damages it incurs in accordance with the terms hereof.

         D. Pursuant to the terms of the Securities Purchase Agreement, $400,000
of the Purchase Price along with interest and dividends and other investment
returns accruing thereon subsequent to deposit with the Escrow Agent (the
"NON-INDEMNITY ESCROW FUNDS" and, together with the Indemnity Escrow Funds and
the Closing Escrow Funds (as defined below), the "ESCROW FUNDS"), shall be held
in escrow as provided herein until the Escrow Shares have been issued to the
Buyer and the Stockholders' Equity Adjustment Amount, if any, has been paid to
the Buyer.

         E. Pursuant to the terms of the Securities Purchase Agreement, $200,000
of the Non-Indemnity Escrow Funds (the "Stockholders' Equity Adjustment Escrow
Funds") shall be held in escrow as provided herein as the sole source of
recovery by the Buyer for the Stockholders' Equity Adjustment Amount as provided
in Section 1.3 of the Securities Purchase Agreement.

         F. The Escrow Agent has agreed to serve as escrow agent and to hold and
disburse the Escrow Funds in accordance with the terms, and subject to the
conditions, of this Agreement.

         NOW, THEREFORE, in consideration of the foregoing Recitals and the
covenants and conditions set forth below, the Parties hereto agree as follows:

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         1. CERTAIN DEFINED TERMS. As used in this Agreement, the following
terms shall have the following meanings:

             "APPROVAL PERIOD" has the meaning set forth in the Securities
             Purchase Agreement.

             "BANKRUPTCY EVENT" has the meaning set forth in SECTION 4(e).

             "BUYER CLAIM NOTICE" has the meaning set forth in SECTION 5(b)(i).

             "CLOSING ESCROW FUNDS" has the meaning set forth in SECTION 5(a).

             "COMPANY DISPUTE NOTICE" has the meaning set forth in SECTION
             5(b)(i)

             "DETERMINATION COMMITTEE" has the meaning set forth in the
             Securities Purchase Agreement; provided that, in the event any
             member of the Determination Committee as of the Closing of the
             Securities Purchase Agreement is removed or resigns or fails to be
             re-elected as a director of the Company, then the Determination
             Committee shall consist of such Persons that were members of the
             Determination Committee as of the Closing of the Securities
             Purchase Agreement and are, as of the relevant time, directors of
             the Company; further provided that, in the event no such Persons
             remain as directors of the Company, the Company shall appoint an
             independent trustee to serve on the Determination Committee.

             "DETERMINATION DATE" shall mean the date of determination of the
             Stockholders' Equity Adjustment Amount in accordance with Section
             1.3 of the Securities Purchase Agreement.

             "ESCROW ACCOUNT" means the bank account in which the Escrow Funds
             are held.

             "ESCROW FUNDS" has the meaning set forth in the Recitals.

             "ESCROW PARTIES" means the Parties other than the Escrow Agent.

             "ESCROW PERIOD" means the period commencing on the date hereof and
             terminating upon the release of all of the Escrow Funds pursuant to
             the terms hereof (the "TERMINATION DATE"), provided that provisions
             hereof that would otherwise continue by their terms, including, but
             not limited to, terms providing for obligations to the Escrow
             Agent, shall continue after the Termination Date.

             "ESCROW SHARES" has the meaning set forth in the Securities
             Purchase Agreement.

             "FINAL ORDER" has the meaning set forth in SECTION 5(b)(iii)(x).

             "HOLDBACK PERIOD" has the meaning set forth in the Securities
             Purchase Agreement.

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             "INDEMNIFIABLE DAMAGES" has the meaning set forth in the Securities
             Purchase Agreement.

             "INDEMNITY ESCROW FUNDS" has the meaning set forth in the Recitals.

             "JOINT RELEASE CERTIFICATE" has the meaning set forth in SECTION
             5(b)(ii).

             "NON-INDEMNITY ESCROW FUNDS" has the meaning set forth in the
             Recitals.

             "ORDER" has the meaning set forth in SECTION 5(b)(iii)(x).

             "PARTY" or "PARTIES" has the meaning set forth in the introduction.

             "PERMITTED INVESTMENTS" has the meaning set forth in SECTION 4(d).

             "PERSON" means any natural person or entity of any kind, including,
             but not limited to, a corporation, a limited liability company, a
             partnership or an association.

             "PURCHASE PRICE" has the meaning set forth in the Securities
             Purchase Agreement.

             "SECURITIES PURCHASE AGREEMENT" has the meaning set forth in the
             Recitals.

             "SHARE INCREASE" has the meaning set forth in the Securities
             Purchase Agreement.

             "SHARE INCREASE NOTICE" has the meaning set forth in Section
             5(c)(ii).

             "STOCKHOLDERS' EQUITY ADJUSTMENT AMOUNT" has the meaning set forth
             in the Securities Purchase Agreement.

             "STOCKHOLDERS' EQUITY ADJUSTMENT ESCROW FUNDS" has the meaning set
             forth in the Recitals.

             "STOCKHOLDERS' EQUITY ADJUSTMENT NOTICE" has the meaning set forth
             in Section 5(c)(i).

         2. RECITALS. The Recitals are incorporated herein by reference and made
a part of this Agreement.

         3. ESCROW AGENT. The Company and the Buyer hereby designate and appoint
Escrow Agent to act as escrow agent in accordance with the terms and conditions
of this Agreement, and Escrow Agent hereby accepts such designation and
appointment.

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         4. ESCROW FUNDS.

             (a) DEPOSIT OF ESCROW FUNDS. Concurrently with the execution and
delivery of this Agreement, the Buyer shall deliver or cause to be delivered to
the Escrow Agent, in accordance with the terms of the Securities Purchase
Agreement, a wire transfer of immediately available funds in the amount of the
Escrow Funds to be held and disbursed in accordance with the terms hereof. The
Escrow Agent will not make any payment or distribution of the Escrow Funds
except as and in the manner expressly provided for in this Agreement.

             (b) RIGHTS TO ESCROW FUNDS. Except as expressly provided herein,
none of the Escrow Parties shall have any right, title or interest in or
possession of any of the Escrow Funds, until released pursuant to the terms
hereof. Therefore, except as otherwise provided in SECTION 4(e) hereof, none of
the Escrow Parties shall have the ability to pledge, convey, hypothecate or
grant a security interest in any portion of the Escrow Funds until disbursed
pursuant to the terms hereof, and until such disbursement the Escrow Agent shall
be in sole possession of the Escrow Funds and will not act or be deemed to act
as custodian for any party for purposes of perfecting a security interest
therein. Accordingly, except as otherwise provided in SECTION 4(e) hereof, no
Person shall have any right to have or to hold any of the Escrow Funds as
collateral for any obligation and no Person shall be able to obtain a security
interest in any assets (tangible or intangible) contained in or relating to any
of the Escrow Funds.

             (c) PAYMENT OF ESCROW FUNDS. Any payment of the Escrow Funds to be
made by the Escrow Agent pursuant to this Agreement (whether to the Company or
to the Buyer) shall be made by wire transfer in immediately available funds
(upon receipt of written wire transfer instructions of the recipient).

             (d) INVESTMENT OF ESCROW FUNDS. The Escrow Agent will invest the
Escrow Funds in Permitted Investments. As used in this Agreement, "PERMITTED
INVESTMENTS" means (i) direct obligations of the United States or any agency
thereof, or obligations guaranteed by the United States or any agency thereof,
(ii) commercial paper rated at least A-1 by Standard & Poor's Corporation and
P-1 by Moody's Investors Service, Inc., (iii) time deposits with, including
certificates of deposit issued by, any office located in the United States of
any bank or trust company which is organized under the laws of the United States
or any State thereof and has capital, surplus and undivided profits aggregating
at least $100,000,000 and which issues (or the parent of which issues)
certificates of deposit or commercial paper with a rating described in clause
(ii) above, or (iv) Federated Treasury Obligations Money Market Fund with a
right of redemption on a daily basis and having assets of at least $100,000,000,
substantially all of which assets consist of investments of a type described in
the foregoing clauses; provided in each case that any investment referred to in
clauses (i) through (iii) above matures within 10 days or less from the date of
acquisition thereof by the Escrow Agent.

             (e) SECURITY INTERESTS IN ESCROW FUNDS. It is the intent of the
Company and the Buyer that each of their respective interests in the Escrow
Funds is merely a contingent right to payment and that neither a voluntary nor
involuntary case under any applicable bankruptcy, insolvency or similar law nor
the appointment of a receiver, trustee, custodian or similar official in respect
of the Company or the Buyer (any of which is referred to herein as a "BANKRUPTCY
EVENT") shall increase its or his respective interest in the Escrow Funds or
affect, modify, convert or otherwise change the contingent nature of its or his
respective right to payment of the Escrow Funds in accordance with the terms of

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this Agreement. Accordingly, in order to assure the foregoing result even if it
is determined by a court of competent jurisdiction (whether or not in connection
with a Bankruptcy Event) that the Company or the Buyer has an interest in the
Escrow Funds that is greater than a contingent right of payment from the Escrow
Funds payable only in accordance with the provisions hereof, the Parties agree
as follows:

                  (i) The Company hereby grants the Buyer a first priority
         security interest in, and hereby pledges and assigns to the Buyer, all
         of its right, title and interest in the Escrow Funds (and any account
         in which the Escrow Funds are deposited) to secure the Company's
         obligations hereunder and under the Securities Purchase Agreement. The
         Escrow Agent hereby agrees to act as bailee and possessory agent on
         behalf of the Company in respect thereof. The Escrow Agent shall, upon
         receipt of indemnification satisfactory to it from the Company for its
         fees and expenses incurred in connection with taking such actions, take
         all actions as may be reasonably requested in writing of it by the
         Company to further perfect or maintain the security interests created
         by the Company hereunder in the Escrow Funds (and any account in which
         the Escrow Funds are deposited). Such security interests shall
         automatically be released with respect to any Escrow Funds distributed
         pursuant to the terms of this Agreement; and

                  (ii) The Buyer hereby grants the Company a first priority
         security interest in, and hereby pledges and assigns to it all of its
         right, title and interest in the Escrow Funds (and any account in which
         the Escrow Funds are deposited) to secure the Buyer's obligations
         hereunder. The Escrow Agent hereby agrees to act as bailee and
         possessory agent on behalf of the Buyer in respect thereof. The Escrow
         Agent shall, upon receipt of indemnification satisfactory to it from
         the Buyer for its fees and expenses incurred in connection with taking
         such actions, take all actions as may be reasonably requested in
         writing of it by the Buyer to further perfect or maintain the security
         interests created by the Buyer in the Escrow Funds (and any account in
         which the Escrow Funds are deposited). Such security interests shall
         automatically be released with respect to any Escrow Funds distributed
         pursuant to the terms of this Agreement.

The parties hereto agree and acknowledge that the establishment and maintenance
of the escrow account hereunder is intended to constitute possession of the
Escrow Funds for the purposes of perfecting the security interests therein
created hereby.

         5. CLAIMS; RELEASE OF ESCROW FUNDS. The Escrow Funds shall be held and
disposed of by the Escrow Agent for the benefit of the Buyer and the Company, as
the case may be, as follows:

             (a) RELEASE OF CLOSING ESCROW FUNDS AND ESCROW FUNDS. The sum of
$680,000 of the Escrow Funds (the "CLOSING ESCROW FUNDS") shall be held pursuant
to the terms of this Section 5(a). If, at or before 5:00 p.m. on January 10,
2002, the Buyer has received from the Company (i) an opinion of counsel
substantially in the form of EXHIBIT 5(a) attached hereto (the "OPINION"), (ii)
a Schedule 3.7(b) to the Securities Purchase Agreement initialled by the
Company, (iii) evidence reasonably satisfactory to the Buyer that a directors
and officers liability policy providing at least $5.0 million of coverage on
customary terms is in place for the Company, and (iv) evidence satisfactory to
the Buyer, in its reasonable discretion, that that certain Share Exchange
Agreement, dated as of October 12, 2001, by and between the Company and

                                        5

<Page>

Cash Card Communications Corp. Ltd., and all agreements related thereto
(collectively, the "C-4 AGREEMENTS"), and all transactions contemplated in
connection therewith, have been terminated and that no liability will accrue to
the Company, the Buyer or any individuals or entities affiliated with the
Company or the Buyer as a result of such termination or otherwise as a result of
any of the C-4 Agreements or any transactions contemplated thereby (the receipt
of (i), (ii), (iii) and (iv), collectively, the "BUYER SATISFACTION"), then, the
Buyer shall so inform the Company and the Buyer and the Company shall deliver to
the Escrow Agent a jointly executed letter informing the Escrow Agent of the
Buyer Satisfaction (the "BUYER SATISFACTION NOTICE"). The Escrow Agent shall,
within three (3) business days after its receipt of such Buyer Satisfaction
Notice, and provided that the Escrow Agent has received the Refrain Letter
Notice (as defined below) at or before the Cut-off Time (as defined below),
release the Closing Escrow Funds to the Company. In the event that at or before
5:00 p.m. on January 10, 2002, the Escrow Agent has not received such Buyer
Satisfaction Notice, then, notwithstanding anything in this Agreement to the
contrary, within three (3) business days thereafter, the Escrow Agent shall
release to the Buyer the Escrow Funds. If, at or before 5:00 p.m. on December
26, 2001, the Buyer has received from the Company the refrain letters as
referred to in Section 4.9 of the Securities Purchase Agreement (such receipt is
referred to herein as a "REFRAIN LETTER Receipt") then, the Buyer and the
Company shall deliver to the Escrow Agent a jointly executed letter (a "REFRAIN
LETTER NOTICE") informing the Escrow Agent of the Refrain Letter Receipt no
later than 5:00 p.m. on December 27, 2001 (the "CUT-OFF TIME"). In the event the
Refrain Letter Notice is not received by the Escrow Agent by the Cut-off Time,
then, notwithstanding anything to the contrary, the Escrow Agent shall within
three (3) business days thereafter, release the Escrow Funds to the Buyer.

             (b) RELEASE OF INDEMNITY ESCROW FUNDS. This Section 5(b) is subject
to the terms of Section 5(a), above.

                  (i) At any time during the Escrow Period (subject to the terms
         of the Securities Purchase Agreement), if the Buyer desires to receive
         a disbursement from the Indemnity Escrow Funds as payment, in whole or
         in part, for Indemnifiable Damages incurred by the Buyer, Buyer shall
         deliver to the Escrow Agent a written notice which shall set forth (x)
         the amount of the Indemnifiable Damages, (y) the factual basis
         underlying such claim for Indemnifiable Damages and (z) the Section(s)
         of the Securities Purchase Agreement pursuant to which such
         Indemnifiable Damages are claimed (a "BUYER CLAIM NOTICE"). The Buyer
         shall concurrently deliver a copy of such Buyer Claim Notice to the
         Determination Committee in accordance with the notice provisions of
         this Agreement. Unless the Determination Committee delivers to the
         Escrow Agent a written notice stating that the Company objects to all
         or any portion of the requested disbursement set forth in a Buyer Claim
         Notice within twenty (20) days from the date that such Buyer Claim
         Notice is received by the Determination Committee (such written notice
         of objection, the "COMPANY DISPUTE NOTICE"), the Escrow Agent shall
         disburse to the Buyer within three (3) business days after the end of
         such 20-day period from the Indemnity Escrow Funds, that portion of the
         Indemnity Escrow Funds equal in value to the Indemnifiable Damages
         claimed in such Buyer Claim Notice.

                                        6

<Page>

                  (ii) If the Determination Committee delivers to the Escrow
         Agent a Company Dispute Notice in respect of a Buyer Claim Notice in
         accordance with the terms of this Section, the Escrow Agent shall (x)
         disburse to the Buyer from the Indemnity Escrow Funds that portion of
         the Indemnity Escrow Funds equal in value to the Indemnifiable Damages
         claimed in such Buyer Claim Notice and not objected to in such Company
         Dispute Notice and (y) make no disbursement of Indemnity Escrow Funds
         in respect of Indemnifiable Damages claimed in such Buyer Claim Notice
         to the extent objected to in such Company Dispute Notice unless and
         until the Escrow Agent has obtained from the Buyer and the
         Determination Committee jointly executed instructions in form and
         substance reasonably satisfactory to the Escrow Agent (a "JOINT RELEASE
         CERTIFICATE") directing the disbursement of Indemnity Escrow Funds in
         respect of Indemnifiable Damages claimed in such Buyer Claim Notice and
         objected to in such Company Dispute Notice.

                  (iii) In the event of any disagreement between the
         Determination Committee and the Buyer resulting in adverse claims or
         demands being made on the Indemnity Escrow Funds, or in the event that
         the Escrow Agent in good faith is in doubt as to what action it should
         take hereunder, the Escrow Agent shall be entitled to retain that
         portion of the Indemnity Escrow Funds for which a disputed claim has
         been made until the Escrow Agent:

                           (x) shall have received a final non-appealable order,
                  judgment or decree (collectively, an "ORDER") of a court of
                  competent jurisdiction directing delivery of the disputed
                  portion of the Indemnity Escrow Funds, which Order shall be
                  accompanied by an opinion of counsel for the party to whom
                  such Order directs delivery of all or portion of the Indemnity
                  Escrow Funds that such Order represents a final adjudication
                  of the rights of the parties, and that the time for appeal
                  from such Order has expired without an appeal having been
                  noticed, filed or perfected (a "FINAL ORDER"), in which event
                  the Escrow Agent shall disburse the Indemnity Escrow Funds (or
                  any portion thereof) in accordance with such Final Order; or

                           (y) shall have received a Joint Release Certificate
                  directing delivery of the disputed portion of the Indemnity
                  Escrow Funds, in which event the Escrow Agent shall disburse
                  the agreed-upon portion of the Indemnity Escrow Funds in
                  accordance with such Joint Release Certificate; or

                           (z) shall have filed an interpleader action
                  concerning the disputed portion of the Indemnity Escrow Funds.

                  (iv) EXPIRATION OF THE HOLDBACK PERIOD. Upon the expiration of
         the Holdback Period, the Escrow Agent shall (i) deliver to the Company
         all Indemnity Escrow Funds with respect to which the Escrow Agent has
         not as of such time received a Buyer Claim Notice, and (ii) retain all
         Indemnity Escrow Funds with respect to which the Escrow Agent has by
         then received a Buyer Claim Notice, which funds shall be held in escrow
         by the Escrow Agent and only released in accordance with Sections
         4(a)(i) - (iii) above.

                                        7

<Page>

             (c) RELEASE OF NON-INDEMNITY ESCROW FUNDS. This Section 5(c) is
subject to the terms of Section 5(c) above.

                  (i) RELEASE OF STOCKHOLDERS' EQUITY ADJUSTMENT ESCROW FUNDS.
         Within the three (3) day period immediately following the Determination
         Date, the Buyer and the Determination Committee shall deliver to the
         Escrow Agent a jointly executed letter in form and substance reasonably
         satisfactory to the Escrow Agent instructing the Escrow Agent to
         release to the Buyer from the Stockholders' Equity Adjustment Escrow
         Funds an amount equal to the Stockholders' Equity Adjustment Amount,
         or, if the Stockholders' Equity Adjustment Amount is equal to zero,
         notifying the Escrow Agent of such fact and directing that no release
         of Stockholders' Equity Adjustment Escrow Funds shall be made pursuant
         to this Section 5(c)(i) (an "STOCKHOLDERS' EQUITY ADJUSTMENT NOTICE").
         The Escrow Agent shall, within three (3) business days after its
         receipt of the Stockholders' Equity Adjustment Notice release to the
         Buyer that portion of the Stockholders' Equity Adjustment Escrow Funds
         identified as the Stockholders' Equity Adjustment Amount in accordance
         with the Stockholders' Equity Adjustment Notice.

                  (ii) SHARE INCREASE AND ISSUANCE OF ESCROW SHARES.
         Notwithstanding anything in this Agreement to the contrary, upon the
         earlier of (x) the approval of the Share Increase and the issuance of
         the Escrow Shares, and (y) the fifth day following the end of the
         Approval Period, the Buyer and the Determination Committee shall
         deliver to the Escrow Agent a jointly executed letter in form and
         substance reasonably satisfactory to the Escrow Agent (A) stating
         whether, as of such time, the Share Increase has been approved or
         rejected by the shareholders of the Company and whether the Escrow
         Shares have been issued to the Buyer, and (B) instructing the Escrow
         Agent to release the appropriate amount of the Non-Indemnity Escrow
         Funds, in light of any amounts that may be paid pursuant to Section
         5(c)(i) above (as determined by the Escrow Parties and set forth in
         such letter), (1) to the Company, if the Share Increase has by then
         been approved and the Escrow Shares have by then been issued to the
         Buyer, or (2) to the Buyer, if the Share Increase has not by then been
         approved or the Escrow Shares have not by then been issued to the Buyer
         (the "SHARE INCREASE NOTICE"). The Escrow Agent shall, within three (3)
         business days after its receipt of such Share Increase Notice, release
         the Non-Indemnity Escrow Funds in accordance with the Share Increase
         Notice; provided, however, that notwithstanding anything contained in
         this Section 5(c)(ii) to the contrary, the Escrow Agent shall not
         release the Stockholders' Equity Adjustment Funds portion of the
         Non-Indemnity Escrow Funds to the Company until the Escrow Agent has
         received the Stockholders' Equity Adjustment Notice in accordance with
         Section 5(c)(i) hereof and disbursed the Stockholders' Equity
         Adjustment Funds in accordance with the terms thereof.

                  (iii) In the event of any disagreement between the
         Determination Committee and the Buyer resulting in adverse claims or
         demands being made on the Non-Indemnity Escrow Funds, or in the event
         that the Escrow Agent in good faith is in doubt as to what action it
         should take hereunder, the Escrow Agent shall be entitled to retain
         that portion of the Non-Indemnity Escrow Funds for which a disputed
         claim has been made until the Escrow Agent:

                                        8

<Page>

                           (x) shall have received a final non-appealable order,
                  judgment or decree (collectively, an "ORDER") of a court of
                  competent jurisdiction directing delivery of the disputed
                  portion of the Non-Indemnity Escrow Funds, which Order shall
                  be accompanied by an opinion of counsel for the party to whom
                  such Order directs delivery of all or portion of the
                  Non-Indemnity Escrow Funds that such Order represents a final
                  adjudication of the rights of the parties, and that the time
                  for appeal from such Order has expired without an appeal
                  having been noticed, filed or perfected (a "FINAL ORDER"), in
                  which event the Escrow Agent shall disburse the Non-Indemnity
                  Escrow Funds (or any portion thereof) in accordance with such
                  Final Order; or

                           (y) shall have received a Joint Release Certificate
                  directing delivery of the disputed portion of the
                  Non-Indemnity Escrow Funds, in which event the Escrow Agent
                  shall disburse the agreed-upon portion of the Non-Indemnity
                  Escrow Funds in accordance with such agreement, within three
                  (3) business days after its receipt of such Joint Release
                  Certificate; or

                           (z) shall have filed an interpleader action
                  concerning the disputed portion of the Non-Indemnity Escrow
                  Funds.

             (d) FINAL PAYMENT. Upon disbursement of all Escrow Funds, as the
case may be, the Escrow Agent shall be released from any further duty or
obligation hereunder with respect to the Escrow.

             (e) RECEIPT OF JOINT RELEASE CERTIFICATE. Notwithstanding anything
in this Agreement to the contrary, in the event Escrow Agent receives a Joint
Release Certificate at any time within the period during which this Agreement is
in effect, the Escrow Agent shall act in accordance with such Joint Release
Certificate.

         6. ESCROW AGENTS DUTIES. The Escrow Parties understand and agree that:

             (a) ALL DUTIES. This Agreement expressly sets forth all the duties
of the Escrow Agent with respect to any and all matters pertinent hereto. No
implied duties or obligations shall be read into this Agreement against the
Escrow Agent.

             (b) NO LIABILITY; INDEMNIFICATION. The Escrow Agent shall not be
liable in connection herewith except to the extent of its proven willful
misconduct or gross negligence. The Escrow Parties shall jointly and severally
indemnify and hold harmless the Escrow Agent (and any successor Escrow Agent)
from and against any and all losses, liabilities, claims, actions, damages and
expenses, including reasonable attorneys fees and disbursements, arising out of
and in connection with this Agreement; provided, however, that in the event of a
dispute among the Escrow Parties, the non-prevailing party shall indemnify and
hold the prevailing party harmless against any and all costs and expenses
(including reasonable attorneys fees) incurred by the prevailing party pursuant
to the provisions hereof.

             (c) RELIANCE BY ESCROW AGENT. The Escrow Agent shall be entitled to
rely upon any order, judgment, certification, demand, notice, instrument or
other writing delivered to it hereunder without being required to determine the
authenticity or the correctness of any fact stated therein or the

                                        9

<Page>

propriety or validity of the service thereof. The Escrow Agent may act in
reliance upon any instrument or signature believed by it to be genuine and may
assume that any Person purporting to give receipt or advice or make any
statement or execute any document in connection with the provisions hereof has
been duly authorized to do so.

             (d) ADVICE OF COUNSEL. The Escrow Agent may act pursuant to the
advice of counsel with respect to any matter relating to this Agreement and
shall not be liable for any action taken or omitted in accordance with such
advice. The Escrow Agent shall be under no duty to monitor performance by any
party of its or his obligations under any agreement.

             (e) INTEREST IN FUNDS. The Escrow Agent does not have any interest
in the Escrow Funds deposited hereunder but is serving as escrow holder only and
having only possession thereof. Escrow Agent shall have no tax reporting duties
with respect to the Escrow Funds or interest thereon, such duties being the
responsibility of the party or parties which receive, or have the right to
receive, any taxable income hereunder. Notwithstanding the foregoing, Escrow
Agent has the authority to comply with the provisions of Section 468B(g) of the
Internal Revenue Code of 1986, as amended, and any regulations promulgated
thereunder. Such authority shall include, without limitation, (i) the filing of
tax returns (including information returns) with respect to the Escrow Funds,
(ii) the payment of any tax, interest or penalties imposed thereon, (iii) the
withholding of any amounts which are required to be withheld and (iv) the
payment over of such withheld amounts to the appropriate taxing authority. The
Escrow Parties shall provide the Escrow Agent with all information necessary to
enable Escrow Agent to comply with the foregoing. Escrow Agent may withdraw from
the Escrow Funds amounts necessary to pay all applicable income or withholding
taxes (plus interest and penalties thereon) that are required to be paid. The
Escrow Parties shall equally pay or reimburse the Escrow Agent upon request for
any transfer taxes or other taxes relating to the Escrow Funds incurred in
connection herewith and shall indemnify and hold harmless the Escrow Agent from
any amounts that it is obligated to pay in the way of such taxes. This SECTION 6
shall survive notwithstanding any termination of this Agreement or the
resignation of the Escrow Agent.

             (f) NO REPRESENTATIONS. The Escrow Agent makes no representation as
to the validity, value or genuineness of any security or other document or
instrument held by or delivered to it. The Escrow Agent shall have no liability
for the loss of value of any Escrow Funds.

             (g) NO ADVICE REQUIRED. The Escrow Agent, in its role as such,
shall not be called upon to advise any party as to the wisdom in selling or
retaining or taking or refraining from any action with respect to any securities
or other property deposited hereunder.

             (h) RESIGNATION OF ESCROW AGENT. The Escrow Agent (and any
successor Escrow Agent) may at any time resign as such by delivering the Escrow
Funds to any successor Escrow Agent jointly designated by the Buyer and the
Company in writing, or to any court of competent jurisdiction, whereupon the
Escrow Agent shall be discharged of and from any and all further obligations
arising in connection with this Agreement. The resignation of the Escrow Agent
will take effect on the earlier of (1) the appointment of a successor (including
a court of competent jurisdiction) or (2) the day which is 10 days after the

                                       10

<Page>

date of delivery of its written notice of resignation to the other parties
hereto. If at that time the Escrow Agent has not received a designation of a
successor Escrow Agent, the Escrow Agent's sole responsibility after that time
shall be (i) to safe keep the Escrow Funds until receipt of a designation of
successor Escrow Agent or a joint written disposition instruction by the other
parties hereto or a final order of a court of competent jurisdiction or (ii) to
deliver such funds to a court of competent jurisdiction.

             (i) REIMBURSEMENT. The Escrow Parties jointly and severally agree
to equally reimburse the Escrow Agent for all reasonable expenses, disbursements
and advances incurred or made by the Escrow Agent in performance of its duties
hereunder (including reasonable fees, expenses and disbursements to its counsel
which may include lawyers from its own firm at their standard rates).

             (j) NO AGREEMENTS. The Escrow Agent is not a party to, and is not
bound by, any agreement referred to herein or by any other agreement among the
other parties hereto or their respective heirs, administrators, successors or
assigns.

             (k) NO ASSIGNMENT BINDING. Subject to Sections 4(e) and 16 hereof,
no assignment of the interest of any of the Escrow Parties or their successors
shall be binding upon the Escrow Agent unless and until written evidence of such
assignment in form satisfactory to the Escrow Agent shall be filed with and
accepted by the Escrow Agent.

             (l) DUTY OF CARE. The Escrow Agent shall exercise the same degree
of care toward the Escrow Funds as it exercises towards its own similar property
or similar property held in escrow for the account of others (whichever degree
of care is higher), and shall not be held to any higher standard of care under
this Agreement.

             (m) REFRAINING FROM ACTIONS. If the Escrow Agent shall be uncertain
as to its duties or rights hereunder or shall receive instructions from any
Escrow Party which, in the opinion of the Escrow Agent, are in conflict with any
of the provisions of this Agreement, the Escrow Agent shall be entitled to
refrain from taking any action until it shall be directed otherwise by a Joint
Release Certificate or Final Order.

         7. NOTICES. Any notices, demands or other communication given in
connection herewith shall be in writing and be deemed given (i) when personally
delivered, (ii) when sent by facsimile transmission and a confirmation of the
transmission is received by the sender or (iii) three (3) days after being
deposited for delivery with a recognized overnight courier, such as FedEx, with
directions to deliver within three (3) days, and addressed or sent, as the case
may be, to the address or facsimile number set forth below or to such other
address or facsimile number as such Party may designate in accordance herewith:

                                       11

<Page>

         When the Buyer is the intended recipient:

                  Ener1 Holdings, Inc.
                  500 West Cypress Creek Road
                  Suite 770
                  Fort Lauderdale, Florida 33309
                  Attention:  Chief Executive Officer

         with a copy to:

                  Robert C. Boehm, Esq.
                  Akerman, Senterfitt & Eidson, P.A.
                  SunTrust International Center
                  28th Floor
                  One S.E. 3rd Avenue
                  Miami, FL 33131-1714
                  Facsimile:  (305) 374-5095

         When the Determination Committee is the intended recipient:

                  Inprimis, Inc.
                  1601 Clint Moore Road
                  Boca Raton, FL 33487
                  Attention: Eduard Will
                  Facsimile: (561) 997-6227

         with a copy to:

                  Kenneth E. Adelsberg, Esq.
                  Pillsbury Winthrop LLP
                  One Battery Park Plaza
                  New York, New York 10004-1490
                  Facsimile: (212) 858-1500

         When the Escrow Agent is the intended recipient:

                  Robert C. Boehm, Esq.
                  Akerman, Senterfitt & Eidson, P.A.
                  SunTrust International Center
                  28th Floor
                  One S.E. 3rd Avenue
                  Miami, FL 33131-1714
                  Facsimile:  (305) 374-5095

         8. GOVERNING LAW; VENUE. THIS AGREEMENT WILL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE DOMESTIC LAWS OF THE STATE OF FLORIDA, WITHOUT
GIVING EFFECT TO ANY CHOICE OF LAW OR CONFLICTING PROVISION OR RULE (WHETHER OF

                                       12

<Page>

THE STATE OF FLORIDA OR ANY OTHER JURISDICTION) THAT WOULD CAUSE THE LAWS OF ANY
JURISDICTION OTHER THAN THE STATE OF FLORIDA TO BE APPLIED. IN FURTHERANCE OF
THE FOREGOING, THE INTERNAL LAW OF THE STATE OF FLORIDA WILL CONTROL THE
INTERPRETATION AND CONSTRUCTION OF THIS AGREEMENT, EVEN IF UNDER SUCH
JURISDICTION'S CHOICE OF LAW OR CONFLICT OF LAW ANALYSIS, THE SUBSTANTIVE LAW OF
SOME OTHER JURISDICTION WOULD APPLY. IT IS THE INTENTION OF THE PARTIES TO THIS
AGREEMENT THAT THE SITUS OF THE ESCROW ACCOUNTS CREATED BY THIS AGREEMENT BE,
AND THAT IT BE ADMINISTERED IN, THE STATE IN WHICH IS LOCATED THE PRINCIPAL
OFFICE OF THE ESCROW AGENT FROM TIME TO TIME ACTING HEREUNDER.

         9. JURISDICTION AND VENUE. The Parties to this Agreement agree that any
and all actions arising under or in respect of this Agreement shall be litigated
exclusively in any federal or state court of competent jurisdiction located in
the County of Miami-Dade, State of Florida. By execution and delivery of this
Agreement, each party to this Agreement irrevocably submits to the personal and
exclusive jurisdiction of such courts for itself, himself or herself and in
respect of its, his or her property with respect to such action. Each party to
this Agreement agrees that venue would be proper in any of such courts, and
hereby waives any objection that any such court is an improper or inconvenient
forum for the resolution of any such action. The Parties further agree that the
mailing by certified or registered mail, return receipt requested, to the
addresses specified for notice in this Agreement, of any process or summons
required by any such court shall constitute valid and lawful service of process
against them, without the necessity for service by any other means provided by
statute or rule of court.

         10. ENTIRE AGREEMENT. This Agreement and the agreements referred to
herein constitute the entire agreement among the Parties pertaining to the
subject matter hereof and supersede all prior agreements, understandings,
negotiations and discussions, whether oral or written, of the Parties.

         11. AMENDMENTS AND WAIVERS. No supplement, modification or amendment of
this Agreement, or of any covenant, condition or limitation herein contained,
shall be valid unless made in writing and executed by the Parties hereto and the
Determination Committee. No waiver of any covenant, condition, or limitation
herein contained shall be valid unless made in writing and executed by the party
making the waiver.

         12. MULTIPLE COUNTERPARTS. This Agreement may be executed in one or
more counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

         13. SEVERABILITY. If any one or more of the provisions contained in
this Agreement or in any other instrument referred to herein, shall, for any
reason, be held to be invalid, illegal or unenforceable in any respect, then to
the maximum extent permitted by law, such invalidity, illegality or
unenforceability shall not affect any other provision of this Agreement or any
other such instrument.

                                       13

<Page>

         14. NO CONFLICT. Notwithstanding anything in this Agreement to the
contrary, the Parties hereto hereby agree that the fact that Akerman, Senterfitt
& Eidson, P.A. has acted as Escrow Agent hereunder shall not preclude the Escrow
Agent or any member or employee of such firm from providing legal representation
to the Buyer in connection with any matter, including any matter arising from,
or in any way connected with, the transactions contemplated by this Agreement,
the Securities Purchase Agreement or any transactions contemplated hereby or
thereby. The Company acknowledges that Akerman, Senterfitt & Eidson, P.A. has
acted as counsel to the Buyer in connection with the Securities Purchase
Agreement and the transactions contemplated thereby.

         15. WAIVER OF JURY TRIAL. To the full extent permitted by law, each of
the Parties hereto hereby knowingly, voluntarily and intentionally waives the
right it may have to a trial by jury in respect to any litigation based hereon,
or arising out of, under or in connection with this Agreement, or any course of
conduct, course of dealing, statements (whether oral or written) or actions of
any party hereto. This provision is a material inducement for the Escrow Agent
to enter into this Agreement.

         16. SUCCESSORS AND ASSIGNS. None of the Escrow Parties shall assign or
agree to assign or grant to any other party any rights under this Agreement,
including without limitation any rights in or to the Escrow Funds, without the
prior written consent of the other Parties hereto and the Determination
Committee, and this Agreement shall be binding upon, and inure to the benefit
of, the Parties hereto and their respective heirs, personal representatives,
successors and permitted assigns.

         17. SPECIFIC PERFORMANCE. The obligations of the Escrow Parties are
unique in that time is of the essence, and any delay in performance hereunder by
any party will result in irreparable harm to the other Parties hereto.
Accordingly, any party may seek specific performance and/or injunctive relief
before any court of competent jurisdiction, subject to the limitation in SECTION
8 hereof, in order to enforce this Agreement or to prevent violations of the
provisions hereof, and no party shall object to specific performance or
injunctive relief as an appropriate remedy. The Escrow Agent acknowledges that
its obligations, as well as the obligations of the Escrow Parties hereunder, are
subject to the equitable remedy of specific performance and/or injunctive
relief.

         18. NO FEES PAYABLE TO DETERMINATION COMMITTEE MEMBERS. No member of
the Determination Committee shall be entitled to any consideration in respect of
such member's service thereon, other than reimbursement by the Company of such
member's reasonable expenses actually incurred in the performance of such
member's duties hereunder and under the Securities Purchase Agreement. The
Company shall pay, as and when incurred, the reasonable fees and expenses of the
Determination Committee arising out of the performance of its duties hereunder
and under the Stock Purchase Agreement, including any fees of legal counsel or
financial advisors engaged by the Determination Committee.

         19. WAIVERS. No waiver of any provision of this Agreement shall be
binding upon a Party unless such waiver is expressly set forth in a written
instrument that is executed and delivered by such Party (and, in the case of the
Company, executed on behalf of the Determination Committee). Such waiver shall
be effective only to the extent specifically set forth in such written
instrument. Neither the exercise (from time to time and at any time) by a Party
of, nor the delay or failure (at any time or for any period of time) to

                                       14

<Page>

exercise, any right, power or remedy shall constitute a waiver of the right to
exercise, or impair, limit or restrict the exercise of, such right, power or
remedy or any other right, power or remedy at any time and from time to time
thereafter. No waiver of any right, power or remedy of a Party shall be deemed
to be a waiver of any other right, power or remedy of such Party or shall,
except to the extent so waived, impair, limit or restrict the exercise of such
right, power or remedy.

         20. HEADINGS. The headings set forth in this Agreement have been
inserted for convenience of reference only, shall not be considered a part of
this Agreement and shall not limit, modify or affect in any way the meaning or
interpretation of this Agreement.

         21. RIGHTS AND REMEDIES. All rights, powers and remedies afforded to a
Party under this Agreement, by law or otherwise, shall be cumulative (and not
alternative) and shall not preclude the assertion, or the seeking by a Party of
any other rights or remedies.

                         [SIGNATURES ON FOLLOWING PAGE.]

                                       15

<Page>

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as of the date first above written.

                                      ENER1 HOLDINGS, INC.
                                      a Florida corporation

                                      By:   /s/ Michael Zoi
                                           ------------------------------------
                                      Name:     Michael Zoi
                                             ----------------------------------
                                      Title:    President
                                              ---------------------------------

                                      INPRIMIS, INC.
                                      a Florida corporation

                                      By:   /s/ Eduard Will
                                           ------------------------------------
                                      Name:     Eduard Will
                                             ----------------------------------
                                      Title:    Chief Executive Officer
                                              ---------------------------------

                                      AKERMAN, SENTERFITT & EIDSON, P.A.

                                      By:   /s/ Robert C. Boehm
                                           ------------------------------------
                                      Name: Robert C. Boehm
                                      Title: Shareholder

                                       16

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