Description: 7.2V 2000mAh 18650 Massage Stick Lithium-ion Battery Product No.: HG2AE4012 Cell model:  18650 / 2000mAh / 3.6V Battery Specification: 2S1P / 2000mAh / 7.2V Nominal voltage: 7.2V Nominal capacity:  2000mAh Charging voltage:  8.4V Charging current: 400mA Discharge current: 400mA Maximum discharge current: 2000mA Discharge cut-off voltage: 5.5V Internal resistance : ≤100mΩ Delivery voltage: 7.2-7.8V Battery weight: 95g Product size: length 135 * diameter 22mm (Max) Operating temperature: Charging temperature: 0-45°C; Discharge temperature: -20-60°C Storage temperature environment: 1 month - 20-60 ° C; 3 months - 20-45 ° C; 12 months - 20-25 ° C Relative humidity: 65 ± 20% Battery structure: Lithium Battery protection: Battery  protection: short circuit protection, overcharge protection, overdischarge protection, overcurrent protection, etc.        Application field: Massage Stick, sports, fitness, medical equipment powered by Lithium-ion Battery