Should we charge Li-Ion cells to 3.9V?

Hi guys, I finally found a BMS board that can charge lithium cells to 3.9V.

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BMS original link: https://s.click.aliexpress.com/e/_AUSh7Q
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Battery tester/monitor: https://s.click.aliexpress.com/e/_DBDvs4D

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Видео Should we charge Li-Ion cells to 3.9V? канала Sorin - DIY Electrical Nerd