Letter, dated April 1, 2007, amending the Employment Agreement between Yuasa, Inc. and John A. Shea Enersys Inc. JOHN D. CRAIG Chairman, President & CEO

Exhibit 10.15

Letter, dated April 1, 2007, amending the Employment Agreement between Yuasa, Inc. and Xxxx X. Xxxx

Enersys Inc.

XXXX X. XXXXX

Chairman, President & CEO

April 1, 2007

Xx. Xxxx X. Xxxx

c/o  EnerSys

 0000 Xxxxxxxxx Xxxx

 Reading, PA 19605

Dear Xxxx:

With reference to your employment agreement (the “Employment Agreement”) with EnerSys Delaware Inc., f/k/a Yuasa, Inc., (the “Company”), dated November 9, 2000, pursuant to which you are currently employed as Executive Vice President Americas of the Company, the Compensation Committee of the Board of Directors of the Company has approved your salary as set forth in Section 3 of the Employment Agreement is increased to $366,000.00, effective as of April 1, 2007.

Except as expressly set forth in the letter, the Employment Agreement shall remain in full force and effect.

By:

Xxxx X. Xxxxx

Chairman, President & Chief Executive Officer

JDC:jls