Looking at some brushless servo - thoughts? Longer runtime?

[Overdriven]

I just reread your post. I'd try out your va monitor and watch the volts more. Servo torque drops off quite a bit as the voltage drops. Take a look at servo specs @ 4.8 and 6V and you'll see what I mean. If you really want to get technical with this time how long it takes for the voltage to drop to a certain level. The va meter should draw less than a servo would so I doubt you'll notice much difference in runtime.