Description: 18V 4000mAh 18650 Solar Street Lamp Lithium Battery Product No.: HG10AE2003 Cell model:  18650 / 2000mAh / 3.6V     Battery Specification: 5S2P / 4000mAh / 18V Nominal voltage: 18V      Nominal capacity:  4000mAh     Charging voltage:  21V      Charging current: 2000mA   Discharge current: 2000mA   Maximum discharge current: 4000mA  Discharge cut-off voltage: 13.75V    Internal resistance : ≤ 300m Ω     Delivery voltage: 18-20v Battery weight: 550g Product size: 95 * 70 * 38mm (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: short circuit protection, overcharge protection, over discharge protection, over current protection, etc             Application field: solar power, standby power, Solar Street Lamp powered by Lithium Battery