My original tootle puffers, the rainbow one is an eGo stick, the black one is known as an X6 battery, and the gold one is an X9 battery, all with a Viva nova 3.5ml tank, all cheap and nasty eBay rubbish as I found out after purchasing my Coolfire 4, the tank on it at the mo is a Kangertech T3S for tootle puffing outside, great little tank, and then my lung hitter next to it, isub 0.5ohm tank which I also love, not a massive setup, but all I use now is the T3S @ 4.2v, isub tank @ 25-30watts and CF4, just change the coils as an when required.