Just email them and ask. I don't know about teh 18650, but the 14650 (It's a rebranded E-Power) is definitely regulated to 3.7 all the time (Direct from
smok Tech engineering) the switch has a circuit that regulates it to 3.7 to the atty/carto no matter the state of the battery until recharge is needed. (It drops the V to 3.7 on a fresh charged batt, boosts it to 3.7 the lower the batt gets until recharge is needed, buttons starts to flash.. all on teh PCB in the switch)
It's consistent every hit, which is a good thing in my opinion.. but since you are really liking a freshly charged battery with a 3.0ohm carto/atty that's 5.6 watts, with a 2.5 that's 6.7 watts..2.2 standard joye atty 7.6 watts.. so figure whatever you are liking.. how many watts..
You'd probably be happier at 5v.. 3.0 ohm gives you 8.3 watts of power, and if you wanted it cooler you could always use HV attys/cartos (3.2+ ohm) ie. 3.2ohm would bring it down to about 7.8 watts...
Don't know if the e-power or NoEgo would be the best bet for you ANYWAYS.. if you're constantly swapping out batts for the extra kick you should definitely look into a 5v
mod.. you could even crank it up to 10 watts of power by using 2.5 ohm atty/cartos.. but that's a bit much for most
Old Goat has a 5v boxmod (non
juice feeder version) for a mere $25, and i think you'd enjoy it more and have more options of getting an even stronger/hotter vape.. it's definitely going to be *my* next purchase, or a VV boxmod so you can try everything
*link for the goat 5v
http://oldgoatmods.com/Page3.html