I just want to let you know that I recently bought a protank t3 and was very unhappy with it. The grommets were damaged, so I sent it back and the company I ordered it through was very understanding and sent me a replacement. I'm still experiencing some leaks with the new replacement. The battery I have, 900mah isn't powerful enough for the coil resistance either, which you can just purchase lower resistance if you don't have variable voltage. Bottom line, the two tanks I've gone through already have had bad leaks. If you try to clear it of liquid by blowing through it, you'll end up blowing all the liquid out through the bottom. A lot of people are happy with this tank, and a lot aren't, from the comments I've been reading about the issue.