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, 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. Product name: Lithium battery protection board Product type: 4S 14.6V 100A (with Equalization temperature control) : 4S Lithium Iron 14.6V 100A Iron lithium battery nominal: 3.2V Overcharge: Iron Lithium 3.650.025V Overdischarge: Fe-Li 2.350.1V Equalization: Iron Lithium 3.50.025V Current: 100A Charging current (same port): 50A Main circuit on-resistance: 5M Discharge overcurrent protection: 60010A Temperature control protection: charge at 75C, discharge at 75C Working temperature: -20/+80 Short circuit protection: 350US Self-consumption: 40UA Product application range: for Inverter, solar street lamp, electric tool, photovoltaic energy storage UPS, etc, Product size: 145 x 65 x 11mm color:Blue Material:PCB+Metal Package Contents: 1 x lithium 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.