Agree, and I would recommend the poster get an appropriate charger or cheap DC power supply. Then drain and balance the individual cells prior to replacing the BMS. Google “top balancing lifepo batteries”. This will give an indication what cond the cells are in.
I just did this...
I have 3 SOK 206Ah batteries purchased in 2021. No Bluetooth and no heater. Does anyone know if they have a low temp disconnect to protect from charging in freezing temps? I don’t see anything in the mfg literature.