Powerful 12.0 V 10000 mAh NiMH battery pack - Made with10 x D 10000mAh TENERGY high capacity NiMH Batteries- Separate charging and discharging connectors to protect battery from overcharging and over-discharging power off-Internal thermalset of 70oC to prevent overcharging- Ideal for 12V DC power Supply, waling rabot- Quick charge, long life cycle (up to 500 times) and rapid charge - You can use our 7.2V-12V smart charger to charger this battery pack.