Food for thought here. In general back when we were flying AM and FM radios with analog servos a good nicad battery with 4 cells was around 6 volts. 1200 Mah was good for all day. Now with the advent of Spektrum, Hitec, Futaba and others going to 2.4 and the servo technology improving and some are now high voltage servos. A 4 cell NiMh, LIFE, A123 and others at 1200 mah is not going to cut it for all day flying without placing those batteries on a charger after a couple of flights.

I typically fly giant scale aircraft and tend to use a 5 cell hydrimax pack with 4200 Mah. I only use a 4.8 pack for ignition. I always install a voltwatch and check batteries before each flight with all controls to their full deflection and move them around and watch the voltwatch for a drop below the green. It is just good insurance.

any modern computer radio with 2.4 technology will brown out if the voltage pull exceeds the battery output. There are many ways to keep your voltage peaked and some include a lipo pack going through a voltage regulator. I like to keep my installations simple.

I have been flying Spektrum and JR since 2.4 arrived. My current radio is a JR9503 and to date I have not had any issues with any of my planes browning out or worse blacking out. There is a slight learning curve with modern day radios and it is just a matter of providing your receiver with enough voltage to perform the flight and subsequent flights according to your flying style and battery output. If you fly 3D bring a charger with you to the field and after each flight place it on a charge.

I typically get 3 flights out of my 5 cell pack before it needs a top charge.

good luck and I wish you sucess in your future flights.

Regards
Glenn Williams</p>