Quote Originally Posted by Anttazz
Battery type is a LiPo sorry I don't think I specified that earlier. Still haven't been able to solve this problem, thinking possibly its a case of trying out a new battery. This was the first time i've had to charge them though so don't think it should be dead.
It could be that one of the balancing wires inside the LiPo pack has come loose. This problem is a known issue with some brands of LiPo. It will charge without balancing probably but I don't recommend that. Best thing is to measure the balancing wires and see if there is a loose connection and repair it, or use another LiPo pack.