A good friend of mine has had her Honda Insight for about 3 years now. Today she told me that her mileage has dropped â€œsignificantly.â€ She talked w/another Insight owner with a car about the same age. He said he noticed the same thing. They both think that itâ€™s their batteries that arenâ€™t taking the charge the way they used to. The second Insight owner tried getting an answer from Honda Inc. and actually sued them for info. Nada. Well, they paid him $5,000 from the suit, but still no answer about the batteries. My questions are: has anyone with a Pri had the same thing happen: their mileage dropped due to dying batteries? Would such a thing even happen with the Pri due to the different way the Pri hybrid system works?