ORIGINAL: FenderBean
well servo wire is all the same size,
No,
Servos have different cables quality.
We've got many wires from 16 AWG to 24 AWG suitable for our use. That is twice the current capacity.
the plugs are all the same.
No. The manufacturer plugs are rated at 1 amp, multiplex plugs are rated at 60 amp, Emcotec plugs 100 amps, Ashlock crimp plugs 5 amps, Henson crimp plugs 1 amp, etc...
it doesn't matter what you plug into the the servo its still only going to take so much.
Wrong.
The current chain upstream the servo will influence the current drop into the servo.
7.4 volts is plenty for any application, Ions, A123s, Lipos they can all push out more that anything I have ever flown.
Wrong. This is the kind of thinking that bring the guys to crash a plane and claim that their 2.4G system locked out.
What really matters is the impedence of your pack. A Lipo with high impedence will see itsdvoltage drop dramatically under load. Especially with overkill servos and undersized wire and plugs. To the point that the servo will not move anymore. Isolating the receiver will not help at all.