Battery Brand: VCELL/OEM Battery Type: Li-Ion Battery Model: VP36-4400 Nominal Voltage: 36V Nominal Capacity: 4.4Ah Cell Combination: 10S2P Charge Cut-Off Voltage: 42V Discharge Cut-Off Voltage: 27.5V Charge Current: 2A Continuous Discharge Current: 20A Size: 135*75*60mm Weight: Approx 970g Cycle life: 800 cycles @80%DOD