Rechargeable AA batteries for Solar Lights. 1.2V 400mAh AA Ni-MH rechargeable batteries. Four (4) batteries per package. Do not dispose of batteries in municipal waste stream or by fire as batteries may explode. Do not open, short circuit, or mutilate batteries. Dispose of batteries in accordance with Local, State, and Federal regulations. Contains no toxic metals. Do not mix old and new batteries.