RE: *Airtronics RD8000 2.4 GHz*
Sounds good. I looked at my Tx on Saturday, having not charged it since the previousSunday, the voltage was 10.1v. Charged it on the standard wall wart charger to 11.3v for Sunday. Flew two flights and some ground work for setup before the flights, came home with 10.3v once more. I'll look again tonight to see what the voltage has dropped to.
Whatever is in my tx seems to hold it's charge ok over time. No worse than any of my other radios anyway, Futaba and Airtronics.