For anyone reading this to imply that the OP do the same with this battery pack, it would not be a wise idea.
Part of the BMS' job is to prevent damage to Lithium cells by allowing them to suffer deep-discharges. Not unlike a car battery, Empty ≠ zero voltage, or anything below ~3V. Conversely, allowing them to be stored at full charge is also not optimum for best lifetime.
Lithium cells like to operate within a narrow voltage range, and though often ignored in real world practical usage, the best practice is to keep them between 20-80% SoC if better durability is a desired goal.
That said, they should be "exercised" and run through a complete cycle occasionally, for their health, and to keep the BMS happy. Keeping that laptop that only does desk duty connected to AC power all the time does no favors to its battery.
