Exhibit 99

              Certification pursuant to Section 1350 of Chapter 63
                      of Title 18 of the United States Code
      as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, John D. Kavazanjian, President and Chief Executive Officer of Ultralife
Batteries, Inc., hereby certify that (i) the Quarterly Report on Form 10-Q for
the period ended June 28, 2003 attached hereto fully complies with the
requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934,
and (ii) the information contained in the attached Form 10-Q fairly presents, in
all material respects, the financial conditions and results of operations of
Ultralife Batteries, Inc. for the period presented therein.

A signed original of this written statement required by Section 906 has been
provided to Ultralife Batteries, Inc. and will be retained by the Company and
furnished to the Securities and Exchange Commission on request.

Dated: August 8, 2003       /s/ John D. Kavazanjian
                            ---------------------------
                            John D. Kavazanjian
                            President and Chief Executive Officer

              Certification pursuant to Section 1350 of Chapter 63
                      of Title 18 of the United States Code
      as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, Robert W. Fishback, Vice President of Finance and Chief Financial Officer of
Ultralife Batteries, Inc., hereby certify that (i) the Quarterly Report on Form
10-Q for the period ended June 28, 2003 attached hereto fully complies with the
requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934,
and (ii) the information contained in the attached Form 10-Q fairly presents, in
all material respects, the financial conditions and results of operations of
Ultralife Batteries, Inc. for the period presented therein.

A signed original of this written statement required by Section 906 has been
provided to Ultralife Batteries, Inc. and will be retained by the Company and
furnished to the Securities and Exchange Commission on request.

Dated: August 8, 2003       /s/ Robert W. Fishback
                            ----------------------
                            Robert W. Fishback
                            Vice President - Finance and Chief Financial Officer