Product Name: 72V 59ah Li-ion Battery Pack Rechargeable: Chargeable Installation: Open frame Electrolyte: Li-ion Shape: Lipo Discharge Rate: High Discharge Rate Nominal Voltage: 72 Usage: Car, Bus, UPS, Electric Power, Electric Bicycle, Boat Type: Lithium-Ion Batteries Transport Package: Carton Origin: China Product Description Parameter of BatteryWeight34 kg Rated Capacity59AhMinimum Capacity58.82AhEnergy4366WhNominal Voltage 74VOpen Voltage75V~78VLoad Voltage≥74VInternal Impedance ≤20mΩCharge voltage84VStandard charge current 29.5AMax charge current59AStandard discharge current29.5AMax continued discharge curren180ADischarge cut-off voltage54±2VOperating Temperature 0~+45ºC Charge-20~+60ºC DischargeStorage Temperature-20ºC~+60ºC Less than 1 month-20ºC~+30ºC Less than 6 months