Anything that will draw excessive current will drop the voltatge. How severe that drop is totally dependent on the load AND the condition of the battery pack. So, it really does not matter what you fly with it, as long as you spend time to remove any of the binds that would be associated with linkage, especially the throttle, will help. This is why I advocate something like Voltwatch2. These devices give you an immediate indication of any sort of binding and help tremendously with removal and conrol of any binding that may occur during the initial build phases as well as any that might develop after the building process and initial flights (sort of shake-down cruises.. ).

When a bind occurs, the Voltwatch2 LED's go from green to yellow to red, depending on the severity of the bind. A typical bind is at the throttle when the servo goes to the end of the travel of the throttle and tries to move it more.. then it binds and draws a lot of current. When you find these, you make the appropriate adjustments then move on.

This will happen with both 4.8 and 6 volt packs.. it doesn't matter. And if it happens with some of these radio's that have a threshold voltage for reset, well, you know what happens.. it will reset and leave you without control for a few seconds.

Spektrum has "fixed" the problem, however, I really like to avoid the possibility of a problem, so I use the 6 volt packs AND remove any binding in the linkage before I fly.

CGr