FILE - In this file photograph taken Dec. 2, 2009, the 2011 Chevrolet Volt debuts at the Los Angeles Auto Show, in Los Angeles. General Motors will strengthen the structure around the batteries in its... more 
FILE - In this file photograph taken Dec. 2, 2009, the 2011 Chevrolet Volt debuts at the Los Angeles Auto Show, in Los Angeles. General Motors will strengthen the structure around the batteries in its Volt electric cars to keep them safe during crashes, a person briefed on the matter said Thursday. Jan. 5, 2011. (AP Photo/Jae C. Hong, File) less 
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Associated Press | Photo By Jae C. Hong, File
Thu, Jan 5, 2012 12:14 PM EST