Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Forms S-3 (Nos. 333-110426, 333-67808 and 333-90984) and Forms S-8 (Nos. 333-31930, 333-60984, 333-114271 and 333-117662) of Ultralife Batteries, Inc. of our report dated March 18, 2005 relating to the financial statements, financial statement schedule, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP

Rochester, New York
March 18, 2005

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