Bms to be replaces

Hi

I inverted the charging polarity on the charger and of course damaged the BMS of my hailong battery. I can still charge the battery but the battery is always on even the switch is off. Do you know where i can buy a new Bms?

I have had success hooking up smart BMS's that you can connect to via bluetooth or a PC
They cost little more but as you van see the voltage of each cell then you know if it is working or not or balancing or not

Just get the right amp rating and cell series plus chemistry for your application. Here is an example.

https://www.aliexpress.com/item/20S-50A-2017-new-Li-ion-smart-bms-pcm-with-android-Bluetooth-app-UART-correspondence-bms/32809939362.html