Explanatory Note

Ultralife Corporation (the “Company”) is filing this Amendment No. 2 on Form 8-K/A (“Amendment No. 2”) to amend its Current Report on Form 8-K as filed with the Securities and Exchange Commission (the “SEC”) on January 20, 2016 (the “Original Form 8-K”), as amended on Form 8-K/A as filed with the SEC on March 31, 2016 (the “Amended Form 8-K”). The Amended Form 8-K provided historical audited financial statements of the business acquired as required under Item 9.01(a). This Amendment No. 2 amends the historical audited financial statements of the business acquired to make certain revisions, among them the inclusion of an independent auditor’s report pursuant to auditing standards generally accepted in the United States of America.

Item 2.01 Completion of Acquisition or Disposition of Assets

On January 13, 2016, Ultralife UK Limited (the “Merger Subsidiary”), a U.K. corporation and a wholly-owned subsidiary of Ultralife Corporation (the “Company”), completed the acquisition of all of the outstanding ordinary shares of Accutronics Limited (“Accutronics”), a U.K. corporation based in Newcastle-under-Lyme, U.K., from Intrinsic Equity Limited, Catapult Growth Fund Limited Partnership, MJF Pension Trustees Limited, Robert Andrew Phillips and Michael Allen (collectively, the “Sellers”). There are no material relationships between the Company or Merger Subsidiary and any of the Sellers, other than pertaining to this acquisition. Accutronics is a leading independent designer and manufacturer of smart batteries and charger systems for high-performance, feature-laden portable and handheld electronic devices.

The acquisition was completed pursuant to the terms of a Share Purchase Agreement dated January 13, 2016, by and among the Merger Subsidiary and the Sellers. The Merger Subsidiary paid at the time of closing an aggregate purchase price of £7.575 million (approximately $11.0 million) in cash, and in exchange the Merger Subsidiary received all of the outstanding shares of Accutronics ordinary stock. Monies to fund the purchase price were advanced to the Merger Subsidiary from the Company’s general corporate funds.

The purchase price was subject to adjustment based on the difference between actual and estimated amounts of working capital of Accutronics as well as the amount of net cash/indebtedness of Accutronics. The adjustment resulted in a final payment to the Sellers in the amount of £0.133 million on February 24, 2016, bringing the total aggregate purchase price to £7.708 million (approximately $11.2 million).

The Stock Purchase Agreement was filed with our Form 10-K for the fiscal year ended December 31, 2015 to provide investors and security holders with information regarding the terms, provisions, conditions, and covenants and is not intended to provide any other factual information respecting the Company, or Accutronics. In particular, the Stock Purchase Agreement contains representations and warranties made to and solely for the benefit of the parties thereto, allocating among themselves various risks of the transactions. The assertions embodied in those representations and warranties are qualified or modified by information in confidential disclosure schedules that the parties have exchanged in connection with signing the Stock Purchase Agreement. Moreover, information concerning the subject matter of the representations and warranties may be subject to limitations agreed upon by the parties and standards of materiality applicable to the parties that differ from those applicable to investors, and may change after the date of the Stock Purchase Agreement. This subsequent information may or may not be fully reflected in our public disclosures. Accordingly, investors and security holders should not rely on the representations and warranties in the Stock Purchase Agreement as characterizations of the actual state of any fact or facts.

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

The following unaudited pro forma condensed combined financial statements are based on our historical consolidated financial statements and Accutronics’ recasted historical financial statements as adjusted to give effect to the Company’s acquisition of Accutronics. The unaudited pro forma condensed combined statement of operations for the twelve months ended December 31, 2015 gives effect to the transaction had it occurred on January 1, 2015. The unaudited pro forma condensed combined balance sheet as of December 31, 2015 gives effect to the transaction had it occurred on January 1, 2015.

The assumptions and estimates underlying the unaudited adjustments to the pro forma condensed combined financial statements are described in the accompanying notes, which should be read together with the pro forma combined financial statements.

The unaudited pro forma condensed combined financial statements should be read together with the Company’s historical financial statements, which are included in the Company’s latest annual report on Form 10-K, and Accutronics historical information included herein. The financial information provided for Accutronics in the unaudited pro forma condensed combined financial statements has been recast to be consistent with the Company’s fiscal year ended December 31, 2015. Accutronics’ results for this twelve-month period are derived by adding their results for the four months subsequent to its financial statements for its fiscal year ended August 31, 2015 and subtracting the comparable months from the preceding year.

See accompanying notes to the Unaudited Pro Forma Condensed Combined Financial Information

Notes to the Unaudited Pro Forma Condensed Combined Financial Information

(In Thousands, Except Per Share Information)

Note 1 – Basis of Presentation

The historical consolidated financial statements have been adjusted in the pro forma condensed combined financial statements to give effect to the pro forma events that are (1) directly attributable to the business combination, (2) factually supportable and (3) with respect to the pro forma condensed combined statement of operations, expected to have a continuing impact on the combined results following the business combination.

The business combination was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. As an acquirer for accounting purposes, the Company has estimated the fair value of Accutronics’ assets acquired and liabilities assumed and ensured that the accounting policies of Accutronics were consistent with that of the Company.

The pro forma condensed combined financial statements do not necessarily reflect what the combined company’s financial condition or results of operations would have been had the acquisition occurred on the dates indicated. They also may not be useful in predicting the future financial condition and results of operations of the combined company. The actual financial position and results of operations may differ significantly from the pro forma amounts reflected herein due to a variety of factors.

The condensed combined pro forma financial information does not reflect the realization of any expected cost savings or other synergies from the acquisition of Accutronics as a result of restructuring activities, other cost savings initiatives or sales synergies following the completion of the business combination.

Note 2 – Foreign Currency and US GAAP Conversion

The recast historical financial information of Accutronics was prepared in accordance with United Kingdom Generally Accepted Accounting Standards and presented in British Pounds Sterling. The recast historical information was translated from British Pounds Sterling to US Dollars using the following historical exchange rates:

The Company utilized a third party independent accounting firm to analyze any material differences between UK and US GAAP for Accutronics. Based on this review and the due diligence performed by the Company, we are not aware of any material differences requiring adjustment in the pro forma condensed combined financial statements.

Note 3 – Funding Transaction

The Company completed the acquisition of Accutronics for approximately £7.708 million (approximately $11.2 million) in cash. The Company utilized monies from its general corporate funds for the acquisition.

Note 4 – Preliminary Purchase Price Allocation

The Company has performed a preliminary valuation analysis of the fair market value of Accutronics’ assets and liabilities to identify, value and assign estimated useful lives to intangible assets and to determine goodwill. The resulting valuation analysis is considered preliminary as it has not been audited by the Company’s independent registered public accountant at the time of this filing. The following table summarizes the allocation of the preliminary purchase price as of the acquisition date (in thousands):

The preliminary purchase price allocation has been used to prepare pro forma adjustments in the pro forma balance sheet and income statement. The final purchase price allocation will be determined when the Company’s allocation is audited. The final allocation could differ materially from the preliminary allocation used in the pro forma adjustments. The final audited allocation may include (1) changes in allocations to intangible assets such as customer contracts and relationships, trade name and intellectual property as well as goodwill, (2) changes to deferred taxes and (3) other changes to assets and liabilities.

Note 5 – Pro Forma Adjustments

The pro forma adjustments are based on our preliminary estimates and assumptions that are subject to change. The following adjustments have been reflected in the unaudited pro forma condensed combined financial information:

The unaudited estimates of fair value and estimated useful lives could differ from final amounts upon completion of the Company’s annual audit, and the difference could have a material effect on the accompanying unaudited pro forma condensed combined financial statements. A doubling or halving of the attrition estimates used to estimate the fair value of the customer contracts and relationships could cause a corresponding increase or decrease in the balance between intangible assets and goodwill by approximately 11% to 12%. An increase or decrease in the estimated useful lives of the identifiable intangible assets by five years could cause a corresponding change in the balance of intangible assets by approximately +5% or -16%, respectively, with the offset to goodwill. There would also be a corresponding impact to the annual intangible amortization expense.

Note 6 – Non-Recurring Transaction Costs

The Company incurred non-recurring transaction costs of approximately $.25 million which are directly attributable to the Accutronics’ acquisition. These costs, including one-time accounting, legal and due diligence services as well as stamp duties related to the acquisition of the UK-based company, were incurred in the first quarter of 2016 and, accordingly, are not reflected in the pro forma condensed combined financial statements presented herein.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.