I've heard some receivers don't tolerate 6 volts very well but I've had no problems
with it in my JR radio. The 5 cell packs do discharge somewhat faster than the 4 cells
so keep tabs of your batteries charge. On my new ship I'm running a servo isolator
which allows me to run the servos on 6 volts and the receiver on 4.8 volts. This also
isolates the receiver from any interference caused by long servo leads and antenna
routing. Pretty cool! Just got it but seems to work very well.

tommy s