2Pack Enhanced 4S 40A 16.8V Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module for Drill Motor Motorcycle Battery (4S 40A)

Description

Specifications: Charging voltage:16.8v ~ 18.1vOver Charge voltage:4.25±0.05vOver Discharge voltage: 2.5v±0.05vContinuous discharge current (upper limit): 40A (if the heat dissipation environment is not good, please reduce the load current )Continuous charge current (upper limit): 20AInternal resistance: Less than 100mΩApplications: It is suitable for lithium batteries with nominal voltage of 3.7V and full voltage of 4.2V (including 18650, 26650, polymer lithium batteries, no size limit).Besides, it can use for electric drill with starting current below 80A and power below 135W .Note: 1.Do not deliberately make it short circuit.Please strictly according to the diagram wiring to avoid possible damage to the chip. (Connect wires refer to the "wiring diagram"(NO.5 picture).2.When the battery for the first time, do not connect any load or equipment to the output.After connection, it need to charge activation first, then will have the output.3.Do not mix good batteries with bad ones.4.The closer the internal resistance of the 4 battery capacities is the better.5.When using a brush motor type load, try to connect a non-polar capacitor (withstand voltage above 25V, capacity 10uF-100uF) in parallel with the positive and negative terminals of the motor to prevent the reverse spike voltage generated by the motor from interfering with the protection board or breakdown of the MOS tube.Package inlcudes: 2x 4S 40A lithium Battery Protection Board