UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

Current Report

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 14, 2011 (February 18, 2011)

EnerSys

(Exact name of registrant as specified in its charter)

Commission File Number: 1-32253

Delaware	23-3058564
(State or other jurisdiction of incorporation)	(IRS Employer Identification No.)

2366 Bernville Road, Reading, Pennsylvania 19605

(Address of principal executive offices, including zip code)

(610) 208-1991

(Registrant’s telephone number, including area code)

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01. Entry into a Material Definitive Agreement

On February 14, 2011, EnerSys (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Goldman, Sachs & Co. (the “Underwriter”) and certain of the Company’s stockholders (the “Selling Stockholders”) pursuant to which the Selling Stockholders agreed to sell 2,845,869 shares of the Company’s common stock (the “Shares”) to the Underwriter at a price per Share of $35.82 for resale by the Underwriters pursuant to Registration Statement No. 333-151000.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

1.1	Underwriting Agreement, dated February 14, 2011 between EnerSys, Goldman, Sachs & Co. and certain selling stockholders named therein.
5.1	Opinion of Skadden, Arps, Slate, Meagher & Flom LLP.

SIGNATURES

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

EnerSys
By:	/s/ Richard W. Zuidema
	Richard W. Zuidema
	Executive Vice President

Date: February 18, 2011

Exhibit Index

Exhibit No.	Description
1.1	Underwriting Agreement, dated February 14, 2011 between EnerSys, Goldman, Sachs & Co. and certain selling stockholders named therein.
5.1	Opinion of Skadden, Arps, Slate, Meagher & Flom LLP.