The AFS would not really look all that nice on a regular e-cig battery. I had to take a shot to show you what this would look like... hehheh....
For the AFS you really would want to go with a big battery mod that would allow you to vape all day without recharging.
The AFS works by pulling
juice into the atty with your inhales. Each time you take a drag you are not only
vaping but you are also sucking
juice into the atty from the tank of juice (6ml) surrounding the atomizer.
There is a bit more information on the AFS at the main GG site
The AFS V2
Plus it looks a heck of a lot better on a larger device.