This probably comes as no surprise to anyone, but Radio
Shack no longer sells the replacement button battery which
has pigtails on it for soldering it into the circuit.
In order to get it repaired, you will most likely need to
find someone who really knows what they are doing with a
soldering iron, and who is willing to try soldering pigtails
to a button battery, something which you really aren't
suppose to do.
Mike Duke, K5XU
American Council of Blind Radio Amateurs