The way I did my 7.2 mod

[natedogg4674]

I got a 6 (aa) cell rechargable back and converted it from a flat pack to a hump pack, one cell on top, then changed the plugs out so they would fit onto my 15 minute quick charger, removed all the stock battery holder stuff, and slid the battery pack into its place, used double sided tape to keep it in place, wow whhat a difference, super fast, even with the stock motor, anyone that has a stock rocket racer, this should be your first mod if your looking for speed. Ill post some pics of my car after i finish detailing it out.