I live in Canada. Currently, the high temperature is around 45 degrees Fahrenheit. When going down a hill and lightly pushing on the brake pedal, the indicator will show full battery regeneration for about ten seconds, but then it will drop down to three bars of charge, even if I keep the brake pedal lightly pressed and the speed above 40 mph. This seems to happen even if the battery isn't even close to being fully charged. I do not feel the battery cooling fan sucking in air from the vent behind the passenger seat while this is happening, although I know this fan works because it comes on when I use the grid charger. So I'm guessing the battery isn't refusing full charge because it's overheated. Why else would it stop charging at maximum power so soon?