We ship your order rapidly. Coronavirus is causing delays at courier companies however and your item may take three times longer. Please have patience.

4S 12V 40A BMS Battery Management Cell Protection Board With Lithium Li-ion UK

UK Seller. UK Stock
Rapid dispatch within 1 working day to UK and EU

4S 12V Li-ion LiPo Battery Management System BMS. Waterproof, dustproof, shockproof. This is not suitable for LiFEPO4

DISCLAIMER: This item is a sophisticated electronic controller. You will need skill and knowledge to install it and use it. You will need to have done research, some available on YouTube - search "eBike School" and "Jehu Garcia" by example to find out what a bms is, what it does and especially how to install it. Wiring diagrams and how to use the bms are found on this listing. It will not be possible to return this item once opened and used, but most especially due to use or damage caused by negligence or lack of knowledge.


4S 40A BMS is used for 4 series 12V battery pack.The circuit is simple and reliable.Li is for 3.7V li-ion. BMS manufactured by high quality Mos and IC imported.


Keep your battery long cycle service life time. This battery protection module has a equilibrium function to keep each cell in balance and can extend the service life of battery. This battery protection board will protect battery pack from overcharging, over-discharging over-current and short circuit, very useful.

Cover waterproof, dust-proof, shockproof, fireproof and anti-static.

This battery protection board is very portable great for DIY work.

Subscribe