I am new here, also. I have been 
vaping for 2 years, and building my own mods for about as long. I prefer big 
batteries, 14670 AW or Tenergy 18650s, since I HATE getting stuck without a vape. I also have some home-brew powered mods using TI's pth08080 modules set at 4.2V, one in my car and one connected to my  'puter's power supply. Batteries not required...