It can be a problem removing the TX battery on some radios... but there is a fix. (and its easy) Futaba Conquest and a couple of others use a strange plug that you have to remove screws from the radio, pull the back cover and its a real mess to unplug the battery.

Get a short aileron extension cable. Clip in half.

Cut the battery's wire about 1 inch from the battery.

Solder in the aileron extension cable.

You now have a plug that is reliable and easy to get at.

If the radio doesn't have the strange plug... you just take the short aileron extension and leave that plugged into the radio... the battery will have a plug that is compatible with it already.