I and a friend have been flying two E-Starters for a few months with the green 9.6v 750mah batteries from GWS. He has the 400 engine and I have the 350. We both get pretty good flight times with this battery, especially if you go to half-throttle after gaining initial altitude, and both planes fly very well.

We both use the 300 ESC from GWS, which is an 8 amp ESC I believe, and have had no problems. The batteries are cheap, and we get decent flight times and can shoot touch and goes for awhile.