[lincpimp]

I will guess that everyone who has had both will say the flightpower. I have the 4000 14.8 and would not use it in a heavy vehicle. It works fine in my LS10 4wd nitro conversion, but my 5000 4s works better. A pair of those trak power lipos in the case look good and the cells perform very well, looking at the data others have posted about them. These are for your revo? If so I would say to get 5000 or bigger cells.