Venom Racing Rechargeable Batteries are for those racers who are tired of constantly buying disposable alkaline batteries? Venom Power™ Rechargeable NiMH AA Batteries have 2400mah of power and are terrific for Transmitters, Receiver power, Digital Cameras and more. Use a Linear Charger or a wall charger rated for NiMh cells, for these batteries. Charge at .5 Amp for extended life, or at 1 Amp for improved performance.