Hi some tips I have the Sigelei Zmax but I've been told the
smoktek works the same way. So this advise should be good for either.
In the menu you'll see an option to set it to Volts or Watts.
Set it to Watts and than adjust up and down. The unit will always remember the Watts even when you change the battery. It will forget the volts and you have to readjust every time you change battery if you are using on Volts settting
I also find that due to the type of modulation that you can vape at a lower Wattage than other devices. I believe that it runs hotter.
It will take any battery, if you are not an extreme vapor, meaning that you'll be
vaping under 5v and than you should be Ok with a large capacity like 2800mah protected battery. No need for LIMN. It comes with two caps so you use the extended cap for the larger 18650 battery. In terms of battery life you'll get longer life and pay less with a protected Battery.
Don't buy Ultrafire!
One more thing the very last menu [or close to it] gives an option for Mean or RMS. Mine came with a default to Mean, but the
reviews said to set it to RMS to get a smoother Vape.
Good luck!!