When most people think of zero-emission vehicles (ZEVs), the concept suggests an electric motor drive supplied by a rechargeable battery. This can apply to automobiles, trucks, buses, industrial vehicles and railroad locomotives. However, another category of ZEVs does not use batteries, but instead generates power using a fuel cell as a battery alternative. These fuel cell electric vehicles (FCEVs) can cover the full range of vehicles, with the possible exception of the smallest, such as a bicycle.