ENERSYS® ADDS 800 WPC MODEL TO ITS INNOVATIVE DATASAFE® 16V FRONT TERMINAL UPS BATTERY LINE

Reading, Pa., December 3, 2008 — EnerSys has added a new product to its DataSafe® 16V Front Terminal UPS Battery line: the 16HX800F-FR. The DataSafe16HX800F-FR is a valve-regulated lead acid (VRLA) battery that produces 800 WPC for 15 minutes to 1.67 volts per cell at 77ºF.

DataSafe 16V are VRLA batteries that provide more power than 12V batteries and use less space. They are specially designed to back up the primary power system for UPS applications and supply power for 15 minutes until the backup generator is fully operational.

The DataSafe16HX800F-FR can produce the necessary power to handle the runtime for large UPS systems without having to use smaller 12V batteries that require more strings and therefore drives up the system cost. They have up to 50% fewer connections which simplify wiring and helps reduce costs.

The high power rating of the 16V batteries also give users a more economical and space efficient option to large single cell VRLA batteries in high power rated UPS systems.

EnerSys was the first to introduce a 16V front terminal battery for UPS applications. With the addition of the DataSafe16HX800F-FR, EnerSys offers the 16V VRLA batteries in three sizes: 500 Watts Per Cell (WPC), 800 WPC and 925 WPC. They require only 44 sq. ft. to support a typical 750 kVA UPS system with a full 15 minutes of runtime.

“Now, UPS systems are no longer limited to top terminated 12V batteries or bulky 2V cells. Expanding the line to three sizes gives our customers the tools they need to maximize their power density and footprint savings,” said Steve Vechy, director, UPS & Utility Marketing, EnerSys. “A well-rounded line of 16V offers efficiencies for better productivity and bottom lines.”

With the same dimensions (27.2” L x 7.0” W) and 20 pounds lighter (220 lbs.), the DataSafe 16HX800F-FR fits in the same rack system as the 925 DataSafe 16V batteries. Cabinets are available in gray or black to match other data center equipment. Complete front access in the 16V front-terminated DataSafe models makes access and maintenance easier than top-terminated 12V batteries.

EnerSys’ DataSafe battery line offers a wide range of flooded and valve-regulated 2V, 6V, 12V and 16V batteries for UPS applications. For more information on the space efficiency, easier access and cost benefits of the 16HX800F-FR and the line of front-terminated DataSafe16V UPS batteries from EnerSys, visit www.savebatteryspace.com.

EnerSys, the world leader in stored energy solutions for industrial applications, manufactures and distributes reserve power and motive power batteries as well as chargers, power equipment and battery accessories to customers worldwide. With a strong commitment to innovation, EnerSys has developed a broad spectrum of technologies including lead-acid, specialty nickel based and lithium ion batteries. The company’s reserve power batteries are used in numerous applications requiring standby power. Several types of commercial electric powered vehicles employ its motive power batteries, and EnerSys’ premium batteries are utilized in a wide variety of motor vehicle, power sports and recreational vehicles. The company also provides aftermarket and customer support through its global sales and manufacturing network. For more information regarding EnerSys, visit www.enersys.com.

This press release contains forward-looking statements (within the meaning of the Private Securities Litigation Reform Act of 1995), that are based on management’s reasonable expectations and assumptions as of the date the statements are made but involve risks and uncertainties, including, without limitation, significant business, economic, and competitive uncertainties and contingencies, many of which are beyond our control. The Company’s actual results may differ materially from the forward-looking statements for a number of reasons. The Company undertakes no obligation to update or revise any forward-looking statements. For a list of factors which could affect the Company’s results, see the Company’s filings with the Securities and Exchange Commission, including “Item 1A. Risk Factors,” set forth in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2007. Please consider the Company’s forward-looking statements in light of those risks.

For more information, contact Richard Zuidema, Executive Vice President, EnerSys, P.O. Box 14145, Reading, PA 19612-4145, USA. Tel: 800-538-3627; Website: http://www.enersys.com.