I just received a new istick pico tc 75w and it's my first sub ohm setup. I have a few 18650 batts that I use in my vamo2 and my mvp3. Everything I have is dying so I picked up an Endura t22 and can't stand not being able to adjust anything and the vape is way too hot so I got the pico and stupidly tried my eastshine 18650s without checking discharge rate. Luckily they are way too big anyway and only 4A discharge. They aren't even close to fitting the pico at 69.3mm with a protection board. What's the max battery size?? I want something quick so is liion wholesale OK?