Sub-Ohm'ing certainly can use up a battery pretty fast. But here on the Provape forum, we know people can't do that, so they must be sucking in the juice at a pretty rapid pace. Yes they must! Still, I go through some juice the way I vape on a daily basis. I'd guess I go through about 3 - 4 ml a day as I have a 5 ml tank and it get's low by the time I go to bed at night.
