Why plug-in hybrids are top of the pile
Green Cars News
JULY 16, 2009
It tested the performance of two 2007 model Prius hybrids and then converted them into plug-in hybrids using a Hymotion 5kWh lithium-ion battery conversion kit. In its most recent study the prototype battery was replaced with a production model battery and the same pool of drivers was used during vehicle evaluation.
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