Sorry if there was confussion with the 3 cell. It's for when I run the Mamba 25 speedo, not the stock ESC
The stocker is only rated up to a 2 cell Lipo or 6 or 7 cell nimh pack.
With some better Nimh cells,you will notice more "punch"
. There are GP, IB or Kan cells. Adding that seventh cell will give you a boost of power. I beilive there are also some 1400 cells either on there way, or just coming out. It'll be good to see what they offer.