Continuous discharging current:20A Instantaneous diacharge current:100A Charging voltage:54.6V Charging current:20A(Max.) Over-charge detect:4.28±0.05V delay:100ms Color: Silver + Green Material: metal + PCB Over-charge release:4.08±0.05V Over-discharge:2.55±0.08V Over-discharge detect delay:50mS Release voltage:2.9±0.1V Detect voltage:150mV Detect delay:15mS Current detect:120±5A Resistance:≤15mΩ Working current:≤50uA Sleep Current(when Over-discharge):≤10uA Working temperature:-30~80℃ Size:69mm x 52mm x 8mm Main function: Over charge protection, over discharge protection function, short circuit protection function, over current protection function,no with band-balance. Connections: Step1:Connect charging /discharging wire , battery pack negative wire Step2: After confirm the wires are connected OK, plug the connector cable in the DO NOT plug CONNECTOR CABLE in the before connect wire!! Package include: 2x 13S 48V 20A Li-ion Battery Protection Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.