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 resistance MOSSuitable for most electric tools on the market, electric scooters, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, electric tools, etc.Product name: lithium battery protection boardModel: 13 series 15A/20A/25A/30A, same port, with equalizing belt, disconnection protectionProduct type: 13S 15A/20A/25A/30A same portDischarge current: 15A/20A/25A/30ADischarge overcurrent protection value: 3-5 times of continuous currentInternal resistance of main circuit conduction:Less than 20m ohmCharging current [same port]: 6A/6A/6A/10ACharging overcurrent protection: one fifth of discharge overcurrentCharging voltage: string number of ternary battery pack X4.2VApplicable product: ternary polymerProduct size: 60 x 52 x 10mmColour:silverMaterial:PCB+MetalPackage Contents:1 x Battery protection board1 x flat 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.