Description: 7.2V 5200mAh 18650 Lighting Lithium-ion Battery Product No.: HG4AE2551 Cell model:  Lishen 18650 / 2600mAh / 3.6V Battery Specification: 2S2P / 5200mAh / 7.2V Nominal voltage: 7.2V Nominal capacity:  5200mAh Charging voltage:  8.4V Charging current: 1040mA Discharge current: 1040mA Maximum discharge current: 3000mA Discharge cut-off voltage: 5.5V Internal resistance : ≤200mΩ Delivery voltage: 6.8-8.0V Battery weight: 230g Product size: 165.7 * 45.16 * 36.8mm (Max) Operating temperature: Charging temperature: 0-45°C; Discharge temperature: -20-60°C Storage temperature environment:1month - 20-60 ° C; 3months - 20-45 ° C; 12months - 20-25 ° C Relative humidity: 65 ± 20% Battery structure: Lithium Battery protection: short circuit protection, overcharge protection, overdischarge protection, overcurrent protection, etc. Application field: outdoor sports, industrial and mining, portable Lighting equipments powered by Lithium-ion Battery