1)Mainly Im looking at the 8 cell 5000mah battery that has 9.6v. I found a few for $55 online. Will the 9.6v increase speed over the 8.4v NiMH stock battery? Or Is the 11.1 5000mah Lipo worth it i found one for $65 online let me know. Its basically me needing a new charger which is about 42 at my hobby shop.
2)What will the speed differences be between the 8.4v now to the 9.6v and the 8.4v to the 11.1v?

also does anyone have any of these for sale?