.  . Battery Charger, Battery Management System (BMS), Power Control . 4S 40A BMS Balanced Li-Ion Lithium Battery Charger

4S 40A BMS Balanced Li-Ion Lithium Battery Charger

$7.95 (AUD)

BMS (Battery Management System) – a battery management system that is designed to monitor the status of batteries, control the process of charging / discharging the battery, etc.

12 in stock

Qty Discount
2 - 4 5%
5 - 9 8%
10 + 10%
SKU: TS-P303 Categories: , ,

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4S 40A BMS Balanced Li-Ion Lithium Battery Charger


  • 4S 40A BMS Balanced Li-Ion Lithium Battery Charger protective board comes with recovery function-auto recovery.
  • An enhanced version, applicable to electric drills with starting current below 80A, power below 230W(no balanced function).
  • Integrated ten imported low internal resistance MOS tubes, continuous discharge 40A, suitable for electric drills, sprayers, LED lights, low power inverters, etc.
  • Ideal 4S 40A 4S40A li-ion battery 18650 charger BMS PCB protection board for drill motor 14.8V 16.8V lipo cell module.
  • Charging Voltage: 16.8V~18.1V
  • Continuous Discharge Current (upper limit): 40A(If the cooling environment is not good, please reduce the use of load current.)
  • Continuous Charge Current (upper limit): 20A
  • This item is an enhanced version BMS PCB without any equalized charging.
  • The successful start of the drill requires four 10C-20C power battery, or eight 5C-10C power batteries  (ordinary 18650 can not start the drill!!).
  • Strictly according to wiring guide 0V, 4.2V, 8.4V, 12.6V, 16.8V, do not touch any components on the board while soldering the wire to avoid a short circuit.
  • When soldering the battery for the first time or when charging, as long as a single battery exceeds 4.2V, the “430” resistor will heat up and discharge (stopping heating when discharged to 4.19V or so).
  • If the “430” resistor is severely heated (it’s too hot to touch), please check if the wrong line is connected.
  • When connecting four groups of batteries in series, please ensure that the voltage of each group of batteries is the same.
  • If they are different, please charge each group of batteries individually and reconnect it in series. In the discharge test, the battery with a faster voltage drop is poor.

Package Included

1 x Balanced Version 4S 40A Lithium Battery Protection Board BMS Lipo Charger Module

Development  Resources: demo codes, schematics, datasheets, etc

Reference for Stackable Header Arduino shields Pins Starter Kit

Pin header from Wikipedia


1. There may be slight size deviations due to manual measurement, different measuring methods and tools.
2. The picture may not reflect the actual colour of the item because of different photographing light, angles and display monitors.

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Weight .010 kg
Dimensions 4.5 × 5.5 × .34 cm

Product Applications

Suitable for lithium batteries with a nominal voltage of 3.7V and a full voltage of 4.2V (Including 18650,26650, polymer lithium batteries, no restrictions on the size)

We Customize Just for You!!

Tempero Systems offers many custom IoT electronic design services to help tailor our product to your exact needs. Whether you are looking for custom firmware, circuit board modifications, metal enclosures, or industrial color printing, we can help you with a wide variety of design services.

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