Today's Ni-cad batteries do not develop memory.

You will not be able to cycle your transmitter battery through the charging jack. The radios have a diode that protect the battery from discharge installed. If you want to discharge the battery you will need to remove it from the radio. As far as the jack is concerned, you could actually just use a couple of straight pins. Stick them into each side of the jack and then connect the wires from the charger to the pins. But be very careful that the pins do not touch each other or you will more than likely fry your battery and short out your charger.

Ken