BMS circuits as switches, ¿reasonable?

[Barkuti]

Hi fellows.
I am right now tinkering with the idea of overhauling an old Petzl headlamp with a 2S li-ion input driver. I am installing a BMS inside, with additional balance board. Question is, ¿is it 0K to use a small switch over the anode to B+/P+ BMS input as main switch? This way I should be able to switch the thing on/off reliably and efficiently, ¿doesn't it?
Thinking in using a couple of these inexpensive boards in parallel (Hycon HY2120 based):

Product link: https://www.aliexpress.com/item/-/32673816680.html
Any experience with these?
For reference: http://www.hycontek.com/wp-content/uploads/DS-HY2120_EN.pdf

Cheers