I just bought the Sirius Charge Pro Series charger on flmgrip's recommendation (we belong to the same club). WOW, great charger. It is a fast peak charger and batter conditioner that eliminates memory and allows you to charge from your field box gel cell between flights. You can fly all day with this charger and it does a much better job of conditioning your batteries than the stock trickle charger included with your radio. Charges both Rx and Tx simultaneously. I use a 12v power supply to power the charger from a wall outlet when I am home, but you could use your gell cell exclusively, particularly if you attach a charger to your gel cell while the Siruis is being used at home. (I already had the power supply from my RC car days). I highly recommend the Sirius. The downside: $117.99 at HeliProz (What can I say, I had some heli money burning a hole in my pocket and I wanted to be able to quick charge on the fly so I would never miss a flying opportunity due to a failure to plug in the night before. Also, the battery conditioning circuitry was important to me.)