I was wondering about upgrading the batteries that came with my Futaba 6EX, both for the transmitter and receiver (increasing the mah's). Anyone know how to go about doing this, and can recommend a good place to get batteries? The manual says you can get three 15 min. flights on a full charge, then has to be recharged for quite a while. I can really see my tx battery go down while I fly on my sim, and while playing around with the trims and stuff. I'd rather have some long lasting batteries that I can charge overnight at home, and not have to worry about charging at the field, and would like to be able to get in more than 3 flights in a day.