A Hana, Cana, Chana clone is affordable, pocketable, fits in hand, goes to 30W, takes a 18650, doubles as battery charger and reads your coil. You can change the battery almost on the spot if you drain it over the day (two screws). I've got two from FT and one Cloupor from Kidney Puncher. The FT ones work better, the Cloupor is better built. I've also built two with the FT kits. Those are the best of the litter.
As for clearos, I carry a pair of the repairables with some extra resistances (heads) and an eGo-510 adapter to fit on my box VW mod.
