There is another way. If you can do some tedious soldering then go to the link below. It show's how to jumper the diode that prevents you from using a fast charger or cycling you battery while still in your radio. I have done this on all my futaba radio's with nothing but good results. For a jumper I simply took a short piece of wire and tinned it with solder. Then bent it to make a !QUOT!U!QUOT! shape that was wide enough to reach each of the jumper points shown on the link below. Then a quick touch with fine point soldering iron and wala. You can use a fast field charger or cycle your battery without the hassle of removing it from the transmitter. One word of caution. This will void your warranty. But as I said, I have had nothing but success with this. I have added a second link below. It is the page that lists all the transmitters and jumping methods for each.
http://www.siriuselectronics.com/fut9Z Page for a Futaba 9Z
http://www.siriuselectronics.com/services.htm Page that lists other radios that can be jumper-ed.
Good Luck