This protection board is for Lithium Polymer and Lithium Ion battereis only, it cannot be used for lithium iron phosphate batteries.
Module:4S Li-ion Lithium Battery Protection Board
Input / charging voltage 16.8V to 18.1V
Overcharge detection voltage per cell: 4.25±0.025V
Overcharge Lift the voltage per cell: 4.15±0.05V
Over discharge detection voltage per cell: 2.50±0.08V
Over discharge Lift the voltage: per cell: 3.00±0.1V
Overcurrent current:20-30A
Working current:15A(Natural cooling 10.A, add heat sink 15A, the maximum instantaneous current 30A)
Remove protection condition automatic recovery, without activation
Protections:
Short circuit protection
Overcharge protection
Over-discharge protection
Overcurrent protection
Operating temperature: -40-85?
Size: Approx. 50*22*4mm
Datasheet for the IC:
https://www.ablic.com/en/doc/datasheet/battery_protection/S8254A_E.pdf
Shipping list:
1 x 4S 30A Li-ion Lithium Battery 18650 Charger Protection Board