POWER OF ATTORNEY
      Know all by these presents that the undersigned hereby constitutes and appoints Kevin S.
Royal, Sabrina M. Randolph and James DeWitt, with full power of substitution, as the undersigned's
true and lawful attorneys-in-fact to:
      (1)        prepare, execute in the undersigned's name and on the undersigned's behalf, and submit
to the U.S. Securities and Exchange Commission (the "SEC") a Form ID, including amendments
thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling the
undersigned to make electronic filings with the SEC of reports required by Section 16(a) of the
Securities Exchange Act of 1934 or any rule or regulation of the SEC;
      (2)        execute for and on behalf of the undersigned, in the undersigned's capacity as an officer
and/or director of Maxwell Technologies, Inc. (the "Company") and/or 10% holder of the Company's
capital stock, Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of
1934 and the rules thereunder;
      (3)        do and perform any and all acts for and on behalf of the undersigned which may be
necessary or desirable to complete and execute any such Form 3, 4, or 5, complete and execute any
amendment or amendments thereto, and timely file such form with the SEC and any stock exchange or
similar authority; and
      (4)        take any other action of any type whatsoever in connection with the foregoing which, in
the opinion of such attorneys-in-fact, may be of benefit to, in the best interest of, or legally required by,
the undersigned, it being understood that the documents executed by such attorneys-in-fact on behalf
of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such
terms and conditions as such attorneys-in-fact may approve in such attorneys-in-fact's discretion.
      The undersigned hereby grants to each such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the
exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and
powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving
in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any
of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of
1934.
      This Power of Attorney shall remain in full force and effect until the undersigned is no longer
required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and transactions in
securities issued by the Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed
as of this 29 day of October, 2013.

/s/ Jose L. Cortes
Jose L. Cortes

GDSVF&H\1687385.1

MAXWELL TECHNOLOGIES INC 4