1. This protection board is in common use lithium battery protection board (you can adjust for how many strings to be used). 2. Specified chip, stable performance, support disconnection protection, over-current protection, over discharge protection, overcharge protection, with balance, etc. 3. Common use for "same port" and "different port", the protection board uses 15 high-power of ultra-low resistance MOS tube (discharge of 8, charging of 7), in the same port mode can support the discharge current 60A, charging current 60A; different port mode discharge current 80A, charging current 60A. 4. Can use for LMO.Ternary lithium battery.LCO(3.7V)battery packs etc. Single cell battery overcharge protect voltage : 4.21-4.29 V Single cell battery overcharge protect recover voltage : 4.14-4.24 V Overcharge protect delay : 1.5-2.5S Single cell battery over-discharge protect voltage : 2.72-2.88 V Single cell battery over-discharge protect recover voltage : 2.9-3.1 V Over charge protective current:100A Over discharge protective current:100A Over-discharge protect delay : 0.5-1.5S Temperature protect : Yes,have Temperature control interface. Disconnect protect : Yes Shortage protect : Yes Shortage protect recover mode: Off load release. Contact discharge current:80A balance function:yes Ampere balance (Current) : 60MA Current balance accuracy : 4.14-4.24V Accessory Type: Battery Accessories Model Number: Item type: lithium battery protection board Type: 4S colour:White+black Material:PCB+electronic components size:60 x 42mm Package Contents: 3 x Protection Board Only the above package content, other products are not included. Note: Light 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.