Product description14.8V 4S 30A 18650 Lithium Battery BMS PCB Integrated Circuits Protection BoardSpecifications Over charge detection voltage: 4.28 0.05 V Over charging voltage: 4.08 ± 0.1 Over discharge voltage: 2.55±0.08 Over charge detection delay time 0.1s Temperature range：-30/ 80℃ Balanced current: 60±5 mA Working current: 30A Over current: 75±5A Short circuit protection function: there is, disconnect the load can be self recovery.Main function: Over charge protection, over discharge protection function, short circuit protection function, over current protection function, balance.

Feature:1：high-accuracy voltage detection circuit;2：terminal of the charger using high voltage device;3：Low-resistance MOS transistors control the battery charge and discharge;4：low standby current consumption.5：With Balance6：Overcharging Dete ction Voltage: 4.25 +/- 0.05V7：Over charge detection delay: 0.1s8：Over charging Detection Voltage: 2.5+/-0.025V9：Over-current : 20-30A10：Short Circuit Protection Restoration State: release the load and automatic restore11：temperature protection: Yes12：Low internal resistance13：working temperature range: -40~85 celsius

Application:Vacuum cleanermassager battery packLED backup power supply14.8V 16V li-ion electronicssolar power led, ectNote:The protection board can not be used for lithium iron phosphate battery, hernia lamp, hand drill battery pack, can not be used for electric fish machine battery pack, electric bicycle battery pack, children's car battery, 775 (4A) motor, 1W fish eye LED light.

Package inlcuded:1 x 4S 30A lithium Battery Protection Board1 x Connecting line