Key Specifications/Special FeaturesModel number: 05BQ1130-01Battery type: 18650 lithium-ion batteryNominal voltage: 14.8VNominal capacity: 4400mAhInternal resistance: ≤300mΩDimension: 37.7×38.7×133mmCharge voltage: 16.8VCharge current: 0.5CCharge method: CC/CV (constant current/constant voltage)Discharge current: 0.2C (standard), 1C (max)Discharge cut-off voltage: 11VOperating temperature:Charging temperature: 0 to 45°CDischarging temperature: -20 to 60°CVoltage of shipment: 14.8-15.6VStorage temperature:1 month: -20 to 60°C