Well, if an 8.4v 3000maH battery works, then i'll stick with that...
Shaun, how long does the battery last? I conserve as much ammo as i can, so as long as it shoots at least 2000+ rnds before it dies, then i'll be aiight. The ROF, i'm not too worried about. It'll just eat up my ammo quicker. But it should still be decent, and consistant, as far as i'm concerned.
Using just my AK in a game, i may only go through 4-6 mags worth of ammo (~500rnds).