I am looking into getting a battery protection circuit for the 3S LiPo pack I am planning on using in my project. Max current draw will be 5-6A. Since I think it's more efficient to buy something prebuilt I was looking on aliexpress for something that I could use.

However most of the parts sold there are specified as for 18650 battery pack usage. Here is an example:

Protection circuit

Can I use this kind of circuit with a LiPo pack? Do I need to connect the battery + to B+, the battery - to B- and then connect 2 wires of the balance cables to B1 and B2, or am I completely wrong?

Since the circuit is rated a 8A it will be more than sufficient for my needs


  • \$\begingroup\$ What do you mean for battery protection? What do you want it to do exactly? I don't read German so have no idea what this is. What are you wanting to actually do? \$\endgroup\$
    – MCG
    Jan 30, 2018 at 11:00
  • \$\begingroup\$ All the information you need is in the product description. The title "3 S 8A 11.1 V lipo lithium Polymer BMS/PCM/PCB" and voltage specs tell you it is designed for Lipos, and the connection instructions tell and show you how to wire the battery to it. \$\endgroup\$ Jan 30, 2018 at 11:20
  • \$\begingroup\$ Protection for LI- cell packs always means the same: protect against undervoltage, overvoltage and also against cell imbalance. \$\endgroup\$
    – gommer
    Jan 30, 2018 at 11:21

1 Answer 1


Do not worry about the 18650 part of the spec. That's only a cell form factor.

If you have a Li-cell pack that brings out the cell balancing connections, then it'll be just fine. Your assumptions about how to connect it are correct.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.