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                                                                  EXHIBIT 10.10
                                FIRST AMENDMENT
                                       TO
                        INCENTIVE STOCK OPTION AGREEMENT

         This First Amendment to Incentive Stock Option Agreement (the
"Amendment"), dated as of August 23, 1999, is entered into by and between
Richard W. Winterich ("Optionee") and Mobility Electronics, Inc. (the
"Company"). Capitalized terms used herein but not defined herein shall have the
respective meanings ascribed to them in the Agreement (as defined below).

                              W I T N E S S E T H:

         WHEREAS, Winterich and the Company are parties to that certain
Incentive Stock Option Agreement, dated as of April 12, 1999, pursuant to which
Optionee was granted options to purchase up to 30,000 shares of the Company's
common stock (the "Agreement"); and

         WHEREAS, Winterich and the Company desire to amend the Agreement to
the extent provided herein;

         NOW, THEREFORE, in consideration of the premises and other good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereto hereby agree as follows:

         A. AMENDMENT TO AGREEMENT. The Agreement is hereby amended as follows:

                  (i) The first sentence of Section 1 of the Agreement is
hereby amended to read in its entirety as follows:

                  "Under the terms and conditions of the Company's Amended and
                  Restated 1996 Long Term Incentive Plan (the "Plan"), a copy
                  of which is attached hereto and incorporated herein by
                  reference, the Company grants to the Optionee an option (the
                  "Option") to purchase from the Company all or any part of a
                  total of 50,000 shares of the Company's common stock, par
                  value $0.01 per share, at a purchase price of $0.01 per
                  share."

                 (ii) Section 2 of the Agreement is hereby amended to read in
its entirety as follows:

                           "2. CHARACTER OF OPTION. The Option is an "incentive
         stock option" within the meaning of Section 422 of the Internal Revenue
         Code of 1986, as amended (the "Code"); provided, however, that to the
         extent the Option does not qualify as an incentive stock option by
         virtue of exceeding the $100,000 limitation in Section 422(d) of the
         Code, the Option shall be treated as an option other than an incentive
         stock option."

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                  (iii) Section 4 of the Agreement is hereby amended to read in
its entirety as follows:

                           4. VESTING. Subject to the provisions of Section
                  6(b) of the Plan, this Option shall vest in full and be
                  exercisable in whole or in part during its term following the
                  earlier of: (i) the consummation of an initial public
                  offering by the Company; (ii) the consolidation or merger of
                  the Company with or into another business entity pursuant to
                  which immediately following such consolidation or merger, the
                  Company's stockholders fail to hold at least a majority of
                  the voting stock of the surviving entity; (iii) the sale or
                  other transfer in a single transaction or a series of related
                  transactions of all or substantially all of the assets of the
                  Company, except to a subsidiary of the Company; (iv) a
                  "Change In Control" of the Company (as defined in Exhibit A
                  to the Employment Agreement between the Company and Optionee,
                  dated November 20, 1998); (v) the consummation by the Company
                  of a major strategic transaction (which shall mean an
                  investment of $10 million or more into the Company by a
                  strategic partner or investor (excluding any debt facility
                  provided by a financial institution)); or (vi) December 31,
                  2007.

         B. TERMINATION OF AMENDMENT. Notwithstanding anything contained herein
to the contrary, this Amendment shall be considered null and void and to have
never existed in the event that Optionee ceases to be an employee of the
Company on or prior to the first to occur of the following: (i) December 31,
2000; (ii) the consummation of an initial public offering by the Company; (iii)
the consolidation or merger of the Company with or into another business entity
pursuant to which immediately following such consolidation or merger, the
Company's stockholders fail to hold at least a majority of the voting stock of
the surviving entity; or (iv) the sale or other transfer in a single
transaction or a series of related transactions of all or substantially all of
the assets of the Company, except to a subsidiary of the Company (each, a
"Triggering Event"). Optionee agrees that if Optionee exercises any portion of
this Option prior to the occurrence of a Triggering Event and fails to be
employed by the Company at the time of the first occurrence of a Triggering
Event, then Optionee shall forfeit all shares of Common Stock so purchased (and
the Company shall refund to Optionee the exercise price therefor) (the
"Forfeiture"). The Company shall hold any stock certificates to be issued to
Optionee upon exercise of this Option until the occurrence of a Triggering
Event and, in the case of a Forfeiture, the Company shall cancel such stock
certificates so held by the Company.

         C. MISCELLANEOUS.

                  (1) Except as specifically provided herein, the Agreement
shall remain in full force and effect.

                  (2) This Amendment may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

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

                                              MOBILITY ELECTRONICS, INC.

                                              By: /s/ CHARLES R. MOLLO
                                              ---------------------------------
                                              Charles R. Mollo,
                                              Chief Executive Officer

                                              /s/ RICHARD W. WINTERICH
                                              ---------------------------------
                                              Richard W. Winterich

                                      -3-<PAGE>   1
                                                                   EXHIBIT 10.11

                                 FIRST AMENDMENT
                                       TO
                        INCENTIVE STOCK OPTION AGREEMENT

     This First Amendment to Incentive Stock Option Agreement (the "Amendment"),
dated as of August 23, 1999, is entered into by and between Richard W. Winterich
("Optionee") and Mobility Electronics, Inc. (the "Company"). Capitalized terms
used herein but not defined herein shall have the respective meanings ascribed
to them in the Agreement (as defined below).

                              W I T N E S S E T H:

     WHEREAS, Winterich and the Company are parties to that certain Incentive
Stock Option Agreement, dated as of April 12, 1999, pursuant to which Optionee
was granted options to purchase up to 100,000 shares of the Company's common
stock (the "Agreement"); and

     WHEREAS, Winterich and the Company desire to amend the Agreement to the
extent provided herein;

     NOW, THEREFORE, in consideration of the premises and other good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereto hereby agree as follows:

     A. AMENDMENT TO AGREEMENT. The Agreement is hereby amended as follows:

        (i) The first sentence of Section 1 of the Agreement is hereby amended
to read in its entirety as follows:

        "Under the terms and conditions of the Company's Amended and Restated
        1996 Long Term Incentive Plan (the "Plan"), a copy of which is attached
        hereto and incorporated herein by reference, the Company grants to the
        Optionee an option (the "Option") to purchase from the Company all or
        any part of a total of 100,000 shares of the Company's common stock, par
        value $0.01 per share, at a purchase price of $2.00 per share."

        (ii) Section 2 of the Agreement is hereby amended to read in its
entirety as follows:

             "2. CHARACTER OF OPTION. The Option is an "incentive stock
        option" within the meaning of Section 422 of the Internal Revenue Code
        of 1986, as amended (the "Code"); provided, however, that to the extent
        the Option does not qualify as an incentive stock option by virtue of
        exceeding the $100,000 limitation in Section 422(d) of the Code, the
        Option shall be treated as an option other than an incentive stock
        option."
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     B. TERMINATION OF AMENDMENT. Notwithstanding anything contained herein to
the contrary, this Amendment shall be considered null and void and to have never
existed in the event that Optionee ceases to be an employee of the Company on or
prior to the first to occur of the following: (i) December 31, 2000; (ii) the
consummation of an initial public offering by the Company; (iii) the
consolidation or merger of the Company with or into another business entity
pursuant to which immediately following such consolidation or merger, the
Company's stockholders fail to hold at least a majority of the voting stock of
the surviving entity; or (iv) the sale or other transfer in a single transaction
or a series of related transactions of all or substantially all of the assets of
the Company, except to a subsidiary of the Company.

     C. MISCELLANEOUS.

        (1) Except as specifically provided herein, the Agreement shall remain
in full force and effect.

        (2) This Amendment may be executed in two or more counterparts, each of
which shall be deemed an original, but all of which together shall constitute
one and the same instrument.

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

                               MOBILITY ELECTRONICS, INC.

                               By:   /s/ CHARLES R. MOLLO
                                     -----------------------------------------
                                     Charles R. Mollo, Chief Executive Officer

                                     /s/ RICHARD W. WINTERICH
                                     -----------------------------------------
                                     Richard W. Winterich

                                      -2-

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