Integrated IC + temperature control + offline protection 20 MOS tubes on both sides, voltage resistance 85v Lead to lithium support maximum string Short circuit protection (alloy resistance sampling) Weak current switch,Continuous current (not false) Model: Upgraded version of four strings 12v 120A balanced same port 3.2v Continuous current short time: ≤120A (short time) Continuous current for a long time: ≤70A (not false) Discharge overcurrent protection: ≈400A Balance current: 52mA (opening voltage 3.525V) Charging limit: voltage 14.6V current ≤ 50A Temperature protection: discharge high temperature 73℃; charge high temperature 55℃ Overcharge protection voltage: single cell 3.65V±0.025V Over-discharge protection voltage: Single cell 2.30V±0.05V Short circuit protection: Yes (short circuit test is not recommended) Applicable assembly: four strings (nominal 3.2v lithium iron phosphate battery) Load power: DC 12V within 900 (actual) Motor starting current is less than 400A Car emergency backup power supply (The product printed words depending on the batch, but this does not affect use) Color: As Shown Material: PCB Package Contents: 1 x 4S 12V Protection board Only the above package content, other products are not included. Note: Light reflection 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.