A battery engineer checks a Chevrolet Volt battery at the General Motors Global Battery Systems Lab in Warren, Michigan Wednesday, June 30, 2010. The Chevrolet Volt will offer customers an unprecedented standard 8 year/100,000 mile warranty on its lithium-ion battery. GM engineers have completed more than 1 million miles and 4 million hours of validation battery testing since 2007. Each Volt battery pack has nine modules and 288 cells. GM designed and engineered 99 percent of the 155 components in each battery. (Photo by John F. Martin for Chevrolet)
A battery engineer checks a Chevrolet Volt battery at the General Motors Global Battery Systems Lab in Warren, Michigan Wednesday, June 30, 2010. The Chevrolet Volt will offer customers an unprecedented standard 8 year/100,000 mile warranty on its lithium-ion battery. GM engineers have completed more than 1 million miles and 4 million hours of validation battery testing since 2007. Each Volt battery pack has nine modules and 288 cells. GM designed and engineered 99 percent of the 155 components in each battery. (Photo by John F. Martin for Chevrolet)
A Chevrolet Volt battery at the General Motors Global Battery Systems Lab in Warren, Michigan Wednesday, June 30, 2010. The Chevrolet Volt will offer customers an unprecedented standard 8 year/100,000 mile warranty on its lithium-ion battery. GM engineers have completed more than 1 million miles and 4 million hours of validation battery testing since 2007. Each Volt battery pack has nine modules and 288 cells. GM designed and engineered 99 percent of the 155 components in each battery. (Photo by John F. Martin for Chevrolet)
The first Chevrolet Volt battery moves through the assembly process at the General Motors Brownstown Battery plant in Brownstown Township, Michigan Tuesday, December 22, 2009. The Brownstown facility is the first lithium-ion battery pack manufacturing plant in the U.S. operated by a major automaker. (Photo by Jeffrey Sauger for General Motors)
