The list of electric vehicles bound for the 2010 Detroit Auto Show grew on Thursday with word that the battery-electric Volvo C30 has been tweaked and will make an appearance in the Motor City. Volvo had announced the car last September but now says the new version "is a much more complete product." "The new battery-electric C30 features a complete interior and full instrumentation, as well as enhanced battery packaging," said Lennart Stegland, director of Volvo Cars Special Vehicles, in a statement. "The first prototype helped us identify the main technological challenges without compromising the C30's personality. The electric C30 in Detroit is a much more complete product."