Cool, yeah because of the 2:1 ratio, you can go almost double the 18mm diameter of the battery, I say almost, because although it is a 2:1 shrink ratio, not all of them shrink exactly 2:1 - so anything from 20mm to around 30mm should do the job, generally the bigger they are the thicker the material, so get 20mm if you can - then just heat with a hairdryer - that should be enough to make it shrink and not too hot to damage the battery.I used to use the battery mainly in the nemesis with 0.2ohm builds. Was recently using in another electronic device and removing battery from there the whole time was what caused the wrapping to rip.
thanks
thanks @Derick. I definitely need to get a few more batteries. Like now I'm in a situation with barely a backup 18650.
I have confidence that I can do the wrapping. The size on the stuff is what I'm really not sure of.
There's a video somewhere of how it is done, will see if I can find it