The subject line sums up the background. I went from v4l 808s, which I still use for some things, then to a 3.7v oldgoat, then decided I wanted 5v and went with a basic battery box mod. I'm doing well at 5v, I definitely prefer the higher voltage, but I'm curious about fat batts. are there any higher/variable voltage fat batts? i know using LR would achieve pretty much the same thing, but are there any ego/kgo type batts that achieve the higher voltage on their own?