I was thinking of doing the same for my first board until I read up on NESE and realized not only how important it is to have a strong connection throughout vibrations while riding, but also that cheap 18650 cell holders from China definitely aren’t rated for the amount of amps we draw with our boards.
I don’t think anyone’s ever tested it for science though, and I don’t think much can go wrong as long as you are prepared to jump off at any moment
You know those mixing machines they use to add pigment to paint tins in hardware stores? That’s what’s happening to your battery when you rattle down the road and transition from pavement to tarmac and go over rocks and obstacles. Except it’s not for 60 seconds, it’s for thousands of miles.
Still feel confident? If so, you’ll be fiiiiiiiiiiiine.
How to test if your battery is good and making good contact throughout its abusive treatment and still making good contact? You could Measure the voltages of the p-groups and see what the change is through time and do it without a bms that would change things. That’s what I do w my suspect battery.