Smokeless Image claims their batteries are all regulated 3.6 volts, even the small ones.
I contacted LiteCig and they said theirs are all regulated around 3.7 volts. For some reason, the LiteCig's I got seem to vape warmer, using the same cartomizers (horizontal coil). No burnt taste though, which is good. I think in the future, though, I may go with the vertical coils.
The 808's I've tried are just amazing performers for their size, it blows away the 510 setups I started with.