1,Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current of battery2,Balance protection, battery voltage balance, make battery life 3,Stable heat dissipation, stable heat dissipation of the aluminum substrate, 4, safety protection absorbs anti-high voltage, reduces MOS tube breakdown, ultra-low internal resistance MOS5,Suitable for most electric tools on the market, electric , electric bicycles, electric tricycles, electric motorcycles, electric vehicles, electric tools, etc.Product name: 4 strings lithium battery protection boardMaterial: PCB+MetalColor: silverModel: 4S 120A balanced with the same port-3.2vContinuous working current: within 120AMomentary working current: within 300ACharging voltage: 12.8-16VCharging current: within 50AOvercharge protection voltage: single cell 3.75V+/-0.025VOver-discharge protection voltage: single cell 2.10V+/-0.05VShort circuit protection: Yes (short circuit test is not recommended)Applicable assembly: three strings of nominal 3.2V lithium iron phosphate batteriesLoad power: DC 12V within 1500 (actual motor starting current is less than 300AProduct size: 56 x 86 x 14mmadvantage:1. Optimized line, bilateral mos channel2. Increase the heat dissipation aluminum sheet3. Thicken the copper skin of the circuit by 2oz4. original for Hongkang ic5. 20 high-power mos on both sidesPackage Contents:1 x 4 series lithium battery protection board1 x Sampling cable