The 2011 Chevy Volt is the production version of the concept car shown at the 2007 Detroit Auto Show. It's a four-door hatchback design, about the same size as a Toyota Prius, and is powered by electric motors with a 220-cell lithium ion battery pack. The batteries can be recharged either by plugging the Chevy Volt in or with an onboard 4-cylinder E85-compatible gasoline engine.