For anyone worried about ' burning out a servo ' on 6v instead of 4.8 v I have run a large variety of servos on 6v without any issues at all. Everything from sub miniature 2.4g indoor stuff to the brick size stuff in 150 cc 3 D monsters. You get a little more torque and a little more speed both of which are good. No body in the clubs I flew with ever reported a burnt out servo.

My main concern with advising beginners to avoid running on 4.8v is that some 2.4 gh receivers can temporarily fail and lock up when the voltage drops below a critical threshold even momentarily. This is called a brown out.

Lots more here on this topic http://www.rcuniverse.com/forum/begi...-brownout.html

Running 6 v is a low cost insurance policy.