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Old 08-16-2012, 12:22 PM   #25 (permalink)
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If they could sell a complete hybrid conversion that doubles your mpg for $3k, they would have a huge winner. but that is really not possible! the hybrid battery alone in a prius sells for $2500 retail. So a $3k price will end up being more like $8k once it is a product and won't double mpg, maybe increase it 20%, at which point it doesn't become very attractive.
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