get 4 14500 batteries and a charger, i have a madvapes vv box, great little thing, charge lastes the whole day and the 14500s only take like 3 hours to charge so its great, the wheel is very sensitive so keep that in mind.
mom and pops Scuba tanks work great on it and the price point is great, 6$ for the DIY kit if you can punch your own cartos.