I see that this thread a year old, so I hope you're still monitoring it. My question is what type of receiver battery are you using? I just bought a new Hitec Aurora 9 and I'm in the process of outfitting 2 airplanes and 1 helicopter with various Optima receivers. One of my models is a Killer Chaos that has 5 standard servos on board. I've read that 2.4 GHz receivers don't like low voltages (less than 3.5v), so I'm worried that my 4.8v pack won't do the job under flight loads. Should I go with a 6.0v receiver battery?

Thanks,

Kaos