ORIGINAL: jester_s1

With it that far out of balance, it's going to take a long time to get it charged since the charger is going to keep drawing down that high cell. What I've done before is used a 2 pin connector like for regular Rx batteries and charge each cell individually through the balance port. That gives you a straight forward full charge for both and then will let you see if there is a battery issue. If you do that and still see a voltage disparity, you may have a bad cell.