Aliexpress 3S 4S 100A BMS – Heltec BMS not balancing and not protecting cells?

I have bought this – overall it looks like the build quality is good, however it is not balancing, and not protecting when cell voltage is different .. watch this video

here are BMS that really works:

Aliexpress Daly BMS: https://bit.ly/2IkIaYu

Aliexpress Smart BMS: https://bit.ly/3nJeRPg

spot welder link: https://bit.ly/3nOhsYu

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Amazon: https://amzn.to/33Uit9D