I just bought a futaba 6EXA within the last month for my primary radio,and installed it in my cub.we have flown it twice at two different days and it worked flawlessly.....I charged the plane the night before with the wall charger and when we arrived at the Field it seemed it wasnt charged because the plane had the jitters, so we thought it was the radio at first but my Friend has the same channel as mine so we tryed his on it and it did the same thing. .....I had bought a hobbico quick Field charger and i think that maybe I've been charging my plane to often due to the volt watch meter that i installed to keep an eye on the charge.is it possible that i shortened the term of the battery due to over charging or simply buy just being over cautious charging it..... and how many flights can i get from the battery in one day?could i leave the plane on and drain the battery so that it can relearn and then charge it over night... your comments would be appreciated THANKS BILL