Another great place for a lipo, 2s small mAh, Low C pack is for your electric fuel pumps. A rubber band around the pump and battery and it is very portable as well as light. I recharge after every weekend, same as I do my TX and reciever/ignition bayyerys. Motors are VERY forgiving of voltage so a 3S wouldn't be a problem either, say a 2200Mah?