In August, I went on a trip with the vents covered causing the batteries to overheat and the IMA to shut down. After getting that problem fixed, the IMA charge indicator seemed to drain faster than it did before, going down to half or lower on the hills I encounter to and from work. About a month or so ago, I left the dome light on overnight. I needed a jump to start the car in the morning. Ever since, the IMA charge indicator doesn't seem to lose more than three bars, even going up the hills where it went down halfway or more before. I also seem to be getting slightly better mileage. Anyone else experience anything like this or have an explanation?