EnerSys (ENS) announced today that it has purchased a controlling interest in Modular Energy Devices, Inc. (ModEnergy), a development stage company. ModEnergy produces large format lithium-ion rechargeable batteries utilized in aerospace and defense applications as well as specialized standby power and commercial applications.

ModEnergy, based in Westerly, Rhode Island, has developed a proprietary method for assembling lithium-ion cells into battery systems that are designed to be safer and more cost effective than competitive products currently available. [ more ]