Capacity 4500 mAh Wattage 99.9 Wh Chemistry Lithium-polymer (LiPo) Maximum Charging Power 180 W Operating Temperature -4 to 104°F / -20 to 40°C Storage Temperature Less than 3 Months: -4 to 113°F / -20 to 45°C More than 3 Months: 72 to 82°F / 22 to 28°C Charging Temperature 32 to 104°F / 0 to 40°C Weight 1.3 lb / 570 g