This little thing's a monster! The 50w iStick is a regulated box mod that's capable of up to 50 watts of power and can fire sub-ohm resistances as low as 0.2. The massive 4400mAh battery (that has passthrough capabilities so you can use it while it charges up) will keep you chuckin' clouds for ages before needing to be plugged in! This mod with a Delta II clearomizer have become my go-to devices while I'm up and about. And, while I am sitting and having a little drip session, I don't have to whip out the mechs and batteries and chargers. I just screw my dripper onto this. I'm tempted to give my mechs away; with regulated box mods like this coming out, who needs 'em anymore? 
