Of course, I'm sure those running V2/3 > Mytek will have the opposite opinion!
Agreed. =)
As far as the powering issue, I run both of my boxes off of a 12V NiMH battery. I'm limited to 12V because of the 316, but there's no reason you couldn't use a 6V. With a 5000 mAH, I get just a hair over 6 hours.
One caveat: the Mytek's power switch is only active with AC power. In other words, if you have a DC source plugged in, the unit is on no matter what. I can just unplug the cable from my battery, but this might be a pain for some people. On the plus side, unlike most of our gear which is calibrated to lead acid bats, the Mytek can tell when my NiMH is low on juice. Not really a big deal, as I know exactly how long I can run everything, but a neat little feature nonetheless.
EDIT: I'm a moron, the Mytek won't run off of 6V, 7-12 only. Just pick up a NiMH pack and be done with it.
So much nicer than lead.