Plug-in hybrid rear bumper
The lithium-ion batteries for plug-in hybrids can store up to 9 kilowatt/hours of electricity in the trunk of a car. It takes about 5 or 6 hours to fully charge the battery from a common household wall outlet, which costs about the equivalent of 55 cents a gallon to fill up, according to PG&E.
April 9, 2007 5:07 PM PDT
Photo by: Tom Krazit/CNET News.com
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