I have an Axial Yeti XL and am currently running two 7.4v 2S 5000mah LIPOS. I thought that 7.4v was the maximum you could run on 4s but I just saw in the manual that you can run two 11.1v lipos in 4s, what difference would that make, performance or run time? I'm a bit of noob so a little insight would be appreciated, thanks all.