Yeah I thought about that too, I do know the exact application of where these came from, and I know that their age varies too, so it is a risk to use them in the high amp draw of esk8.
I think one of the other options like a range extender, big battery backup, or in a scooter or bike where I can pad them well is a better choice.
I will also be getting 30Q cells from the same application and I plan on using those for esk8. Given how much more reliable they are, I am less worried about them.
I always try to store my boards around storage charge if they sit for more than a week, it’s a hard thing to do because then you have to either ride them till they get to storage or just not charge them all the way back up after riding.