I've had my Flux for 2 wks this Fri and have been running it as 4S on pr of 2S 5000mah 25C NeuEnergy lipos - after 20+min run, esc, batts and motor are only warm, so I think that setup's been fine.
I've been looking at a 6S setup - a pr of 3S 5000mah, 25/50C PolyRC XP lipos. I have same question - these good enough?