4-20 string universal, can be directly downgraded, no need toScope of application: 18650 special lithium battery protection board, scooter, drift car protection board, solar street light, LED protection board, motorcycle lithium battery protection board, tricycle power protection board, backup power lithium battery protection boardContinuous Discharge Current: 45AInstantaneous discharge current:150ACharging voltage: 75V20 string 72V LiFePo4 battery protection boardWith BalanceSame port 45AMaximum charging current: 45AOvercharge detection voltage: 3.75+/-0.025VOvercharge protection delay: 100msOvercharge release voltage: 3.6+/-0.05VBattery balance detection voltage: 3.6+/-0.025VBattery balance release voltage: 3.6+/-0.05VBattery balance current: 40+/-5mAOverdischarge detection voltage: 2.1+/-0.08VOverdischarge detection delay: 100msOverdischarge release voltage: 2.3+/-0.1VOvercurrent detection voltage: 150mVOvercurrent detection delay: 10msOvercurrent protection current: 180+/-10AOvercurrent protection release condition: disconnect loadShort circuit protection condition: external load short circuitShort circuit detection delay: 300uSShort circuit protection release condition: disconnect loadMain circuit conduction internal resistance: less than or equal to 15mWorking current: less than or equal to 50uASleep current (when the battery is over-discharged): less than or equal to 10uATemperature range: -30/+80 Celsiuscolour:Silver + greenMaterial:Metal + PCBSize: 122*66*10mmPackage Contents:1x Li-ion Battery Protection Board1x set Cabel wireOnly 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.