Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current of battery Balance protection, battery voltage balance, make battery life longer Stable heat dissipation, stable heat dissipation of the aluminum substrate, safer TVS safety protection absorbs anti-high voltage, reduces MOS tube breakdown, ultra-low internal resistance MOS Suitable for most electric tools on the market, electric scooters, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, electric tools, etc. Model: 14S 40A Product size: 125 x 65 x 10mm Same port/separate port type: same port Continuous discharge current: 40A Discharge overcurrent protection value: 2-3 times of continuous current Overcharge protection voltage: 4.25V Overcharge release voltage: 4.18V Over discharge protection voltage: 2.8V Overdischarge release voltage: 3.0V Balanced turn-on voltage: 4.2V Balance current: 100MA Temperature protection: discharge75 charge55 Operating temperature range: -20C to and70C Material: PCBandMetal colour: silver Package Contents: 1 x Battery protection board 1 x Cable 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.