I've switched to 4.8v, 2000 mA NiMH for virtually all of my planes. The 55 mA charger is slow, but will get there. You will love this change. My voltwatch rarely comes off the top LED.

I also upgraded my 9.6v TX battery from 650 to 2000. While I have not done it yet, because we don't get two nice days in a row on the weekend in the PNW during the winter, I'm pretty certain I could fly both weekend days without recharging. Having changed both, I will be buying a Hitec NiMH charger which charges a 110mA (130?) for both RX and TX, instead of the stock 55mA.

Jack