Strong Performance1.2-volt 600mAh AA Ni-MH rechargeable batteries,Package included: 12 x solar battery 1.2v ni-mh aa 600mAh Convenient ChargingHENREEPOW rechargeable NiMH AA batteries can be charged via solar cell lights or standard charging units Safe and ReliableHENREEPOW batteries are very safe and reliable. For transportation safety purpose, these batteries are only pre-charged with 30%power, so charge them before use for longer working Long-lastingHENREEPOW NiMH rechargeable AA battery, it is built with 600mAh capacity has more rechargeable times than NiCD batteries, spend less money on one-time use disposable alkaline batteries, reduce harm to the environment SuggestionPlease use up the power each time, then recharge it or it will affect its capacity and lifespan. In addition, recharge the battery every 3 months can make its lifespan longer