Nickel metal hydride (NiMH) batteries, invented and patented by Ovonic Battery Company, Inc. of Troy, Michigan, (Ovonic Battery), a subsidiary of Energy Conversion Devices, Inc. (ECD) (Nasdaq: ENER), are clearly the batteries of choice among manufacturers of electric and hybrid electric vehicles (EVs, HEVs) which were on display, and available for ride and drive, at this year's International Electric Vehicle Symposium and Exposition, EVS-17, held in Montreal, Canada. The NiMH battery has been selected because of its high energy (more than twice that of lead acid), high power, long cycle life, maintenance-free and environmentally friendly design.