It¡¯s a standard HP calculator nicd pack as used in the HP45 type calculators. There are people selling rebuilt ones in the USA on Ebay. Not as easy in the UK!
Adrian
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On 22 Mar 2019, at 05:12, Don Bitters via Groups.Io <donbitters@...> wrote:
The original battery pack was a 3 cell battery Ni-Cad @ 4.5v. Years ago I could purchase similar sized 1.5v Ni-Cad cells and rebuild the battery pack. At this point in time I would simply find a battery pack 5V and under, and wire it in to the to the same placement as the original. I have seen multiple 3 cell wireless phone battery packs that would fill the bill as a replacement. The original battery pack and holder is screwed down to the front sub-panel and attached to the RF motherboard via 2 pins. If you replace the jacks on the replacement with the ones from the the original case, then zip tie the new battery pack into the old position, and you are done. Do check the polarity.
Don Bitters
