Hi all,

I have around 6-7 Herewin 12000mAH 20C 22.2V Li battery packs that do not have enough charge to be charged by the factory charger/battery managment system.

I am aware of the methods and dangers involed to slowly bring up the volatge on Li batteries using a benchtop powersupply. I figure slowly charging my dead packs at .1A rate is the best chance I have to see if they are total junk or not.

My questions:

Is it possible to get around or defeat the onboard BMS in the packs in order to trickle charge a battery pack ? Without having to disassemble said pack?

Does anoyone have a pinout or wiring diagram for a Herewin MG12000s Li Battery Pack?


Pic for reference

Hello, there. We are sorry that we are unable to provide the information you want. For your questions, you may send your battery to a professional battery recycling factory for disposal.