Features:Protection circuit board is the heart of battery pack, must to have to avoid battery pack from explosion, fire and damage. It will protect battery pack from overcharging, over-discharging over-current and short circuit.With equilibrium function to keep each cell in balance and good service life.This protection board is used for 7 series 24V Lithium batteries, comes with wire.Choosing the correct protection board and applying it appropriately is vital to the longevity your batteries.Specifications:Size: 90mm*47mm*10mm / 3.54*1.85*0.39"Equalizing Current: 80mA (VCELL=4.20V)Equalizing Point: 4.180.03VOvercharge Threshold: 4.30.05V Overcharge Time Delay: 75mSOvercharge Release: 4.050.05VOver-discharge Threshold: 2.40.08V Over-discharge Time Delay: 5mSOver-discharge Release: Disconnect load, and voltage of each battery cell is higher than over-discharge thresholdOver-current Threshold: 40A Over-current Release: Disconnect load releaseWorking Current; 20AQuiescent Power Dissipation: <500uAShort Circuit Protection: Yes, disconnect load can self-recovery Package Includes:1 x Battery Protection Board