RE: Are these batteries sufficient?
I run 2x 2200 mah packs... and after 4 flights, and some messing around on the ground... I only put 400 ma back into each pack at the end of the day.
To be safe... you could hook up a power meter to make sure you aren't drawing too much. (Hanger 9 makes a nice little meter)
FYI... This is on a falcon with 10 servos, and there is a third battery pack for my engine ECU.