ADOPTS WITH LITHIUM CELL MANAGEMENT OFFERS FAST AND SAFE CHARGING--Adopt intelligent lithium cell management IC for fast and safe charging BALANCING CHARGING EXTENDS BATTERY LIFE--With balance charging to balance the characteristic of each battery in battery pack and prolong battery life MULTI-OVER PROTECTION ENSURES SAFETY USE--Provide a of protection functions including overcharge, over-discharge, short circuit, and temperature protection EQUIPPED WITH ALUMINUM FIN ENSURES QUICK HEAT DISSIPATION--Equipped with thickened aluminum fin to achieve quick heat dissipation MANY TIMES TESTING ENSURES HIGH QUALITY--This product has gone through load and aging test for quality assurance Discharge current: 40A Charging current (same port): 15A Main circuit on-resistance: less than or equal to 15m ohm Charging voltage: 71.4v Overload protection: Detection voltage: 4.25 +/- 0.025v Detection delay: 1000ms 500ms Release voltage: 4.15 +/- 0.05v About discharge protection Detection voltage: 2.8 +/- 0.1v Detection delay: 1000ms 500ms Release voltage: 3.0 +/- 0.1v Balance voltage: Detection voltage: 4.15 +/- 0.025v Current balance: 42MA Overcurrent Protection: Detection voltage: 150MV Detection delay: 1000ms 500ms Current protection: 100 +/- 20a self-consumption: Working power consumption: 35ua Sleep power consumption when discharging: 10ua Operating temperature range: -30/+80 colour: as shown Material: ABS+metal Size: 76x53x1.6mm Package Contents: 1 x bms battery charging protection board Only the above package content, other products are not included. Note: Light 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.