FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Craig John D   2. Issuer Name and Ticker or Trading Symbol EnerSys [ENS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman, President & CEO (Last) (First) (Middle) 2366 BERNVILLE ROAD 3. Date of Earliest Transaction (Month/Day/Year) 08/24/2012 (Street) READING, PA 19605 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 08/24/2012   M   9,437 A $ 16.2 487,626 D   Common Stock 08/24/2012   S   9,437 D $ 37.18 (1) 478,189 D   Common Stock 08/24/2012   M   18,370 A $ 18.25 496,559 D   Common Stock 08/24/2012   S   18,370 D $ 37.36 (2) 478,189 D   Common Stock 08/24/2012   M   15,563 A $ 30.19 493,752 D   Common Stock 08/24/2012   S   15,563 D $ 37.17 (3) 478,189 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Options

$ 16.2

08/24/2012

M

9,437

(4)

05/18/2019

Common Stock

9,437

$ 0

0

D

Stock Options

$ 18.25

08/24/2012

M

18,370

(5)

05/29/2017

Common Stock

18,370

$ 0

23,354

D

Stock Options

$ 30.19

08/24/2012

M

15,563

(6)

05/21/2018

Common Stock

15,563

$ 0

109,063

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Craig John D 2366 BERNVILLE ROAD READING, PA 19605	X		Chairman, President & CEO

Signatures

Karen J. Yodis, by Power of Attorney		08/28/2012
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	This transaction was executed in multiple trades at prices ranging from $37.12 to $37.24. The price reported reflects the weighted average sale price. Full information regarding the number of shares sold and the prices at which the transactons were effected is available to the SEC staff, the issuer and any securityholder of the issuer, upon request.
(2)	This transaction was executed in multiple trades at prices ranging from $37.30 to $37.54. The price reported reflects the weighted average sale price. Full information regarding the number of shares sold and the prices at which the transactons were effected is available to the SEC staff, the issuer and any securityholder of the issuer, upon request.
(3)	This transaction was executed in multiple trades at prices ranging from $37.11 to $37.23. The price reported reflects the weighted average sale price. Full information regarding the number of shares sold and the prices at which the transactons were effected is available to the SEC staff, the issuer and any securityholder of the issuer, upon request.
(4)	These options vested in three equal installments on May 18, 2010, May 18, 2011 and May 18, 2012.
(5)	These options vested in four equal installments on May 29, 2008, May 29, 2009, May 29, 2010 and May 29, 2011.
(6)	These options vested in three equal installments on May 21, 2009, May 21, 2010, and May 21, 2011.

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