How about NiMH? Do they need to be "drained" occasionally? I remember trying it once. They responded longer the next flight, then dropped off in flight time, untill they would not start the motor without cutting out by the BEC.[img]i/expressions/face-icon-small-sad.gif[/img] Checking the pack I found a cell had no power at all. Did I damage it by draining the battery?[img]i/expressions/face-icon-small-confused.gif[/img]