EnerSys — Director's Dealing 2010

May 19, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: EnerSys (ENS)
CIK: 0001289308
Period of Report: 2010-05-17

Reporting Person: Zuidema Richard W (EVP Administration & Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-17	Common Stock	A	13062	—	Acquired	87096	Direct
2010-05-17	Common Stock	A	5843	—	Acquired	92939	Direct
2010-05-18	Common Stock	F	1378	$25.67	Disposed	91561	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-17	3.375% Convertible Senior Notes Due 2038	$	S		Disposed	2038-05-31	Common Stock (7389)	Direct

Footnotes

F1: These shares were granted as market share units and vest one hundred percent on May 17, 2013, subject to acceleration and cancellation upon the occurrence of certain events.

F2: These shares were granted as restricted stock units and vest twenty five percent on each of May 17, 2011, May 17, 2012, May 17, 2013, and May 17, 2014, subject to acceleration or cancellation upon the occurrence of certain events.

F3: The 3.375% Convertible Senior Notes Due 2038 (the "Notes") are convertible into shares of common stock, par value of $001 per share, at an initial conversion price of $40.60 per share, subject to adjustment under certain circumstances.

F4: Only under certain circumstances may the reporting person convert the Notes prior to March 1, 2015.