EnerSys is the largest industrial battery manufacturer in the world, operating 21 manufacturing and assembly facilities worldwide for customers in over 100 countries. Worldwide and Americas headquarters are located in Reading, Pennsylvania, USA with regional headquarters in Europe and Asia.

EnerSys is uniquely positioned to provide expertise in designing, building, installing and maintaining a comprehensive stored energy solution for industrial applications throughout the world. The company's products and services are focused on two primary markets: Motive Power (North & South America) or (Europe) and Reserve Power (Worldwide), (Aerospace & Defense) or (Speciality Batteries).

Motive Power applications include OEM and aftermarket applications in material handling, railway and mining markets. Reserve Power applications include telecommunications, uninterruptible power supply (UPS), electronics, security, portable power, switchgear/utility, and sports and leisure. Products include batteries, chargers, accessories and field service to provide a stored energy system.

EnerSys maintains its leadership position in these markets by providing customers with world-class products and services, achieved through total employee involvement, teamwork, and supplier partnerships. Exceeding our customers' expectations and supplying the highest quality products and services are paramount at EnerSys. This belief is the foundation that helps shape the company's vision for progress and allows our customers to achieve their goals.

The EnerSys story began over 100 years ago, when The Electric Storage Battery Company ( ESB) was founded near Philadelphia in 1888 - its Chloride Accumulator Battery helped launch the Age of Electricity. ESB grew dramatically over the years, through product innovation and by expanding the uses for battery power for automotive and industrial applications.

Today's EnerSys can trace its roots to the ESB industrial battery business. The current company was formed in 2000 from the Motive Power and Reserve Power businesses of Yuasa Inc. In March 2002 EnerSys purchased the Energy Storage Group of Invensys plc making EnerSys one of the world's largest providers of standby DC power solutions. EnerSys' leading brands include Hawker, PowerSafe, DataSafe, EnerSys Ironclad® and Genesis.