48V-40Ah Base Station Battery Model: TP-4840T 48V 40Ah Base Station Battery Nominal Voltage: 48V Nominal Capacity: 40Ah Nominal Energy: 1920Wh Max Continuous Discharge: 40A Built-in BMS: Yes (Over-voltage, over-current, short circuit, temperature protection) Battery Type: LiFePO4 (Lithium Iron Phosphate) Cycle Life: 3000 cycles @ 80% DOD Weight: Approx. 25 kg Dimensions: 442*400*177 mm Certificates: UN38.3 / MSDS / CE https://www.topakpowertech.com/base-station-backup-battery/base-station-battery