[rschoi_75]

the esc can handle up to 6s lipos, so for more power you can run two 3s packs in series. A 5s pack would be similar to what you are running now, since the reduced weight should off set the slight loss in voltage.

Your current charge can handle up to 3s lipo packs, so you can stick with your charger, but you'll be pushing its upper limits. Check out any of the chargers in the rcm store, or the new hyperion chargers at maxamps.

edit: (ya'll are quick.... I type too slow). my post is an echo of the two above.