(2-Pack) 3.7V 4400mAh Rechargeable Li-ion Battery Pack with JST-PH2.0 2P Plug for low drain Equipment, Electronics, Toys, Lighting Specs: Compatibility: Low drain 3.7V 4400mAh equipment. Configuration: 1S2P 2x18650 3.7V cells Power rating: 3.7V / 4400mAh / 16.28Wh Protection: Built-in BMS Dimensions: 2.72"x1.55"x0.76". (69 x 39 x 18 - mm). Weight: 3.3 oz (94 grams). Warranty: One year.