I've noticed that my Duracells in the TX are dropping voltage after about 10 flights. Not much at first but once the voltage drops below about 6 volts I see a dramatic change in the range of the TX. I read somewhere on the boards that the TX drops it power level once the voltage drops below a threshold. My question is: are their rechargeable AA batteries that will put out more than 1.5 volts at full charge? Most of what I find is that the specs on rechargeables are 1.2 volts with 1.4 volts at full charge - no good. Alkaline AA run at about 1.6-1.7 off the shelf but drop quickly. I found these on amazon: http://smile.amazon.com/BPI-2500mWH-Vol ... +1.6+volts But I'm not sure they are legit. Anyone have any ideas for keeping the voltage high enough to keep the TX from dropping bower?