you can use 2 2s lipos in series, or one 4s lipo if you cut the lead off the ESC and just solder on one connector.


buy 2 of these: http://www.outragerc.com/home/detail...oduct&iPro=226

or:

One of these: http://www.outragerc.com/home/detail...roduct&iPro=83


I have had good luck with these lipos and they are very good and powerful.