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BMS 4S 40A module balanced version for lithium or lipo batteries.

They protect the batteries at the time of charging and discharging by increasing their useful life and providing safety.

High charging and discharging current; Compact and lightweight size.
High precision voltage detection circuit, fine and durable workmanship.
Over-discharge protection, over-current protection, overload protection.
The MOS transistor can control the charging and discharging of the battery, low standby current consumption.
To connect cables, use copper wire of more than 3 square millimeters, be the better the shorter
It can handle Lithium cells 18650, 21700... o Lipo

Recommended for use in drills and portable machine tools.


Specifications BMS 4S 40A Module:

Product model: HW-293
Charging voltage: DC 16.8-17.8 V
Direct discharge current: 40a maximum (if the heat dissipation environment is not good, reduce the charging current)
Direct charging current: up to 20A
Product size: 45*60*4mm
Applicable choice: suitable for lithium battery with 3.7 V rated voltage and 4.2 V full charge.


A Battery Management System (BMS) is an electronic system that manages a rechargeable battery (battery or battery), for example, by protecting the battery from operating outside its safe operating area (Safe Operating Area), tracking its status, calculating secondary data, report that data, control of your environment, authentication, and/or balancing it.1

A battery pack that features a battery management system and external data bus communication is a smart battery pack. A smart battery pack must be recharged by a smart battery charger.

BMS 4S 40A


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