[【Battery Type 】: AA 3.2V LiFePo4 (Lithium Iron Phosphate) Solar Battery 【Dimensions (H. x Dia.)】: AA size- 50x14 mm / 1.97x0.55 inch 【Important Note】: AA 3.2V LiFePo4 battery CAN NOT a replacement for AA NiMH 1.2V battery and li-ion 3.7v battery (please check the size and volt make sure it fits your device) 【Great Capacity & High Cycle Life 】: The Capacity is 650mAh 1500 Times Cycle Life 【Package include】: 6 X AA 3.2V LiFePo4 Solar Battery]