That makes me wonder what the efficiency return (if any) would be on battery warmers and insulation?
Clearly this wouldn't be an option if you're leaving the car in a parking lot for several hours...but still....several hundred lbs. of lead is a pretty substantial thermal mass.
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"I got 350 heads on a 305 engine. I get 10 miles to the gallon. I ain't got no good intentions." - The Drive By Truckers.
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