Not to be upstaged by GM's plug-in electric concept vehicle, Ford has unveiled its own concept. The twists are design by Airstream and a hydrogen-powered fuel cell to charge the battery. From the AutoblogGreen article: "The fuel cell, made by Ballard, turns on automatically when the battery charge dips below 40 percent. With the on-board charger (110/220 VAC), the battery pack can be refilled at home. Ford says the HySeries Drive is 50 percent smaller and less complex than conventional fuel cell system and should have more than double the lifetime."