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):  December 7, 2006

EnerSys
(Exact name of registrant as specified in its charter)

Commission File Number:  1-32253

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:

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

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

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

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

Item 7.01.    Regulation FD Disclosure

On December 7, 2006, EnerSys issued a press release announcing that certain of its stockholders plan to sell 6,000,000 shares of its common stock to Lehman Brothers Inc.  For additional information, reference is made to the press release, which is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Item 9.01.    Financial Statements and Exhibits

(d) Exhibits.

  4.1       Specimen Stock Certificate

99.1       Press Release, dated December 7, 2006, regarding the common stock offering by certain stockholders.

Signature(s)

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.

Exhibit Index