Ford Motor Company unveiled the world's first drivable fuel cell hybrid electric plug-in that combines an onboard hydrogen fuel cell generator with lithium-ion batteries to deliver more than 41 mpg with zero emissions. The unveiling happened at the Washington, D.C. Auto Show on January 23, 2007. The vehicle is built on a flexible powertrain architecture that will enable Ford to use new fuel and propulsion technologies as they develop without redesigning the vehicle. This concept vehicle offers Ford the ultimate in flexibility in researching advanced propulsion technology. Ford can take the fuel cell power system out and replace it with a down-sized diesel, gasoline engine or any other powertrain connected to a small electric generator to make electricity like the fuel cell does now. The plug-in hybrid is powered by a 336-volt lithium-ion battery pack at all times. The vehicle drives the first 25 miles each day on stored electricity alone, after which the fuel cell begins...