Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current of batteryBalance protection, battery voltage balance, make battery life longerStable heat dissipation, stable heat dissipation of the aluminum substrate, saferTVS safety protection absorbs anti-high voltage, reduces MOS tube breakdown, ultra-low internal MOSSuitable for most electric tools on the market, electric scooters, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, electric tools, etc.Model: 14S 40AProduct size: 125 x 65 x 10mmSame port/separate port type: same portContinuous discharge current: 40ADischarge overcurrent protection value: 2-3 times of continuous currentOvercharge protection voltage: 4.25VOvercharge release voltage: 4.18VOver discharge protection voltage: 2.8VOverdischarge release voltage: 3.0VBalanced turn-on voltage: 4.2VBalance current: 100MATemperature protection: discharge75; charge55Operating temperature range: -20C to +70CMaterial: PCB+Metalcolour: silverPackage Contents:1 x Battery protection board1 x CableOnly 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.