Hi I have kr808d-1 batteries ,manual and auto, they seem to be working fine with cartomizers. What i don't care for is the fact that the charger i got with my kit apparently has a communication problem with batteries and the light does not turn green when they are fully charged .Thats what i was told by costumer service,they also said to charge for 4hrs and that it is not possible to over charge.Not sure if i believe their response.Any advice? Also would rather have an auto charger that could be hooked to battery all the time to keep it charged. Is there a charger available ?