Originally Posted by Rodneh
When you have any loads such as servos that draw high current, the safest way is to separate servo power from receiver power. Just use any small capacity battery (the current drain is very low) to power only the receiver and then power the servos with a separate bus. Now, even if you get a momentary voltage drop on the servo bus, the receiver keeps on chirping happily along and you will never suffer a brown out.
I've noted the giant scale flyers in my club use those "Breakout" units that easily allows the separation of the receiver and servo battery circuits, along with dual batteries for redundant operation. One of the club members has a model with four 200 inch ounce servos powering just the rudder.