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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(Print or Type Responses)

1. Name and Address of Reporting Person * Hoffman Michael C   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 _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1177 AVENUE OF THE AMERICAS, 40TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 12/12/2006 (Street) NEW YORK, NY 10036 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, par value $0.01 per share 12/12/2006   S   4,523,640 D $ 16.02 20,477,438 I (1) See footnote (2)

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

Option (right to buy)

$ 14.37

01/18/2005

A

10,000

07/21/2005

01/18/2015

Common Stock

10,000

$ 0

10,000

I

See Footnote (3)

Option (right to buy)

$ 14.53

07/21/2005

A

12,500

07/20/2006

07/21/2015

Common Stock

12,500

$ 0

12,500

I

See Footnote (3)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Hoffman Michael C 1177 AVENUE OF THE AMERICAS, 40TH FLOOR NEW YORK, NY 10036	X

Signatures

/s/ Michael C. Hoffman		12/14/2006
**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)	Reporting Person may be deemed to have beneficial ownership of the securities in Table I(5) held by Morgan Stanley Dean Witter Capital Partners IV, L.P. and MSDW IV 892 Investors, L.P.
(2)	Reporting Person has no direct pecuniary interest in securities in Table I(5). Reporting Person may be deemed to beneficially own an indirect pecuniary interest in securities in Table I(5). Reporting Person disclaims beneficial ownership therein except to the extent ultimately realized.
(3)	Reporting Person has no direct pecuniary interest in securities in Table II(9). Reporting Person may be deemed to beneficially own an indirect pecuniary interest in securities in Table II(9). Reporting Person disclaims beneficial ownership therein except to the extent ultimately realized.

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