I do not know if Rusty is still taking care of service after the closure of the factory. None the less if you need a new battery pack (if you have corrosion then you do) reach out to metaldetector.com
I have talked to Michael and they have the holders for both the 6 cell (sand shark and the 8 cell (tiger shark in stock under these part numbers. 6 cell 532-0006 8 cell 532-0006& 8 cell. if there is corrosion into the connectors in the box itself, then I would recommend finding any good electronics shop. They should be able to clean it up and get you beeping again in no time.
Metal Detector . Com phone number is 800-446-0244.
Michael just sent these links to me for ordering. Yes they say White's but they are the same battery pack.