Posts: 351
Threads: 49
Joined: Mar 2008
The battery pac was not designed to have user replaceable cells, but it can be done. The case must be split along its seams (no easy task), and the 3 AA Ni-Cd cells replaced with equivalents available from several battery outlets. The versions that have pre-soldered lugs are essential, and obtain them soldered together if possible. I have used battery packages that were designed for the AT&T 9120 Cordless phone. The outside plastic covering must be ripped off, but the batteries inside are already soldered in the proper configuration. WARNING! Do not get the polarity reversed. Something may get fried when the calc attempts to charge the battery.
Posts: 2
Threads: 0
Joined: Jan 1970
Radio Shack has the required AA nicads with solder tabs. They are working in my 67.