Two Ways to Charge It can be charged by solar lights or battery chargers. If have not enough sunlight, you can choose to charge batteries via REACELL AA battery charger to provide non-stop power. High Capacity 1200mAh high capacity rechargeable AA batteries with improved low self discharge technology, provide longer lasting power to your outdoor solar lights. Secure and Reliable A REACELL rechargeable battery replace a lot of one-time-used batteries, alkaline batteries, and NiCD batteries, don't contain Hg/Cd/Pb, secure and reliable. Wide Application This AA solar batteries is ideal for outdoor solar garden lights, toys, remote controls, toothbrushes, beard trimmers, alarm clocks, walkie talkies, LED candles, mouses and more other electronics.