Exhibit 99

              Certification pursuant to Section 1350 of Chapter 63
                      of Title 18 of the United States Code

      I, John D. Kavazanjian, President and Chief Executive Officer of Ultralife
Batteries,  Inc., hereby certify that (i) the Transition Report on Form 10-K for
the six-month period ended December 31, 2002 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-K  fairly
presents,  in all material  respects,  the financial  conditions  and results of
operations of Ultralife Batteries, Inc. for the period presented therein.

Dated:  April 11, 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

      I, Robert W.  Fishback,  Vice  President  of Finance  and Chief  Financial
Officer of Ultralife  Batteries,  Inc.,  hereby  certify that (i) the Transition
Report on Form 10-K for the  six-month  period ended  December 31, 2002 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-K fairly  presents,  in all material  respects,  the financial
conditions and results of operations of Ultralife Batteries, Inc. for the period
presented therein.

Dated:  April 11, 2003                             /s/ Robert W. Fishback
                                                   -----------------------------
                                                   Robert W. Fishback
                                                   Vice President of Finance and
                                                   Chief Financial Officer