4S 40a Lithium Battery BMS Protection Card Standard Version Battery Li-ion 18650 16.8V Suitable for 4 pcs series 18650 batteries.

Battery does not charge.

For battery protection.

Assumes the task of balancing.

With this module, you can quickly charge high-capacity 4S lithium batteries. Thanks to the voltage protections on it, it protects your batteries from charging at high voltages and prevents damage to the batteries by preventing them from drawing current from your batteries that are about to run out.

Batteries must be charged at limited currents.

Charging the battery without current control will reduce the life of the batteries.

Similarly, rapid withdrawal of high current from the batteries will damage the batteries.

Although BMS products seem to charge batteries, they do not perform current control.

It is suitable to be used only for protecting the batteries.

You need to charge your bms cards and batteries with a current control source.

Battery charging current should be at levels such as 1/10 2/10 of battery capacity.

Remember that charging or discharging too high current will reduce battery life while saving time/power.

Specifications: Protection circuit for 4 x series lithium batteries.

Over-Charging Protection

Battery Over Discharge Protection

Short-circuit protection.

Over current protection

Suitable for 14.8V 16.8V lithium battery packs.

Output power / charging power: Maximum 135W

Discharge current: Maximum 40a

Charging voltage: 16.8V - 18.1V

Continuous charging current: Maximum 20a

Quality and durable card design.

Operating temperature: -40C / +60C

Dimensions: 45mm x 55mm x 3.4mm

Weight: 9gr

Package Includes: 1 x 4S 40a Lithium Battery BMS Protection Card