Exhibit 99.1

Ultralife Corporation Reports First Quarter Results

NEWARK, N.Y. – May 4, 2017 -- Ultralife Corporation (NASDAQ: ULBI) reported operating income of $1.8 million on revenue of $22.0 million for the first quarter ended April 2, 2017. For the first quarter of 2016, the Company reported operating income of $0.5 million on revenue of $20.8 million.

“Our diversified portfolio of commercial and government/defense products contributed across the board to a 5.8% increase in sales and a gross margin of 31.3% for the first quarter. On the strength of these positive results and continued cost discipline, we delivered a 610 basis-point improvement in operating margin to 8.4% and increased EPS more than five-fold to $0.11, for our tenth consecutive quarter of profitability,” said Michael D. Popielec. “Our first quarter performance, strong cash generation and opportunities created by continued investments in market and sales reach expansion and new product development are encouraging indicators for another year of profitable growth in 2017.”

First Quarter 2017 Financial Results

Revenue was $22.0 million, an increase of $1.2 million, or 5.8%, compared to $20.8 million for the first quarter of 2016 reflecting higher medical and government/defense sales. Battery & Energy Products sales increased $1.0 million to $17.5 million, or 6.3%, compared to $16.4 million last year due primarily to higher government/defense, medical, and 9-Volt sales. Communications Systems grew 3.7% to $4.6 million compared to $4.4 million for the same period last year reflecting shipments of power supplies to a large global defense prime contractor which more than offset the year-earlier shipments under the Vehicle Installed Power Enhanced Riflemen Appliqué (“VIPER”) Program.

Gross profit was $6.9 million, or 31.3% of revenue, compared to $6.4 million, or 30.7% of revenue, for the same quarter a year ago. Battery & Energy Products’ gross margin was 28.2%, compared to 31.7% last year, a decrease of 350 basis points, and Communications Systems’ gross margin was 43.0%, compared to 27.0% last year, an increase of 1,600 basis points. For both businesses, the fluctuations in gross margin resulted from variations in product mix.

Operating expenses were $5.0 million compared to $5.9 million last year reflecting discretionary spending reduction actions, acquisition cost synergies and $0.2 million of non-recurring expenses related to last year’s acquisition of Accutronics Ltd. Operating expenses were 22.9% of revenue compared to 28.4% of revenue for the year-earlier period.

Operating income was $1.8 million compared to $0.5 million last year for an operating margin of 8.4% compared to 2.3% last year.

Net income was $1.7 million, or $0.11 per share, compared to net income of $0.3 million, or $0.02 per share, for the first quarter of 2016.

About Ultralife Corporation

Ultralife Corporation serves its markets with products and services ranging from power solutions to communications and electronics systems. Through its engineering and collaborative approach to problem solving, Ultralife serves government, defense and commercial customers across the globe.

Headquartered in Newark, New York, the Company's business segments include Battery & Energy Products and Communications Systems. Ultralife has operations in North America, Europe and Asia. For more information, visit www.ultralifecorporation.com.

Conference Call Information

Ultralife will hold its first quarter earnings conference call today at 10:00 AM ET. To participate in the live call, please dial (800) 915-4836 at least ten minutes before the scheduled start time, identify yourself and ask for the Ultralife call. A live webcast of the conference call will be available to investors in the Events & Presentations section of the Company's website at http://investor.ultralifecorporation.com. For those who cannot listen to the live broadcast, a replay of the webcast will be available shortly after the call at the same location.

This press release may contain forward-looking statements based on current expectations that involve a number of risks and uncertainties. The potential risks and uncertainties that could cause actual results to differ materially include: potential reductions in revenues from key customers, uncertain global economic conditions and acceptance of our new products on a global basis. The Company cautions investors not to place undue reliance on forward-looking statements, which reflect the Company's analysis only as of today's date. The Company undertakes no obligation to publicly update forward-looking statements to reflect subsequent events or circumstances. Further information on these factors and other factors that could affect Ultralife’s financial results is included in Ultralife’s Securities and Exchange Commission (SEC) filings, including the latest Annual Report on Form 10-K.

ULTRALIFE CORPORATION AND SUBSIDIARIES

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ULTRALIFE CORPORATION AND SUBSIDIARIES

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