1. Double a Batteries Rechargeable:12 Count Pre Charged NiMH AA1.2V 300mAh Batteries for Solar Lights and Household Devices,NOTE:For transportation safety purpose, these batteries are only pre-charged with 20%power, so charge them before use for longer working 2. Safe Material:1.2V AA 300mAh Ni-MH rechargeable batteries dont contain Hg/Cd/Pb. They are recycled and It does less harm to environment than disposable batteries 3. Low Self-discharge: It will still maintain 80% of Initial capacity after 3 year of non-use, Please charge 60-80% every 3 months if you don't use batteries for a long time 4. Rechargeable and Money Saving - Using these rechargeable NiMH batteries that can be constantly recharged and reused, spend less money on one-time use disposable alkaline batteries and Recharge up to 1200 Cycles 5.Multiple Uses Double A battery Can be used for power outdoor solar lights, solar lamps and lanterns,TV remotes, wireless mouses, game controllers,flower bed solar lights,