I found a Dive Talker computer in equipment that I had in storage. It was never used. The charger interface tool and the computer interface module appears to be lost. Can anyone help. I would like to give it a try if I can get it working. The LDS instructor said it would drive one to distraction with it's incessant messages. One other question. How might I get the batteries on a Datamaster Sport changed. The batteries are not accessible via a battery port. Both are antiques by todays standards, but both are unused and I don't wish to toss them. Thanks!!! SKIPPY3