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jeejohn · (This post was last modified: 09-13-2021 08:19 PM by jeejohn.)

Updating the post to mentioned that I edited it on July 20, as I made an error in the listing for the Sting model - I have a HP-19C.

I have a bunch of HP (& TI) calculators that I bought some 20+ years ago that I am getting ready to sell.

I had pulled almost all of the batteries out of the calculators back then to make sure that I did not have a battery leaking and damaging the calculators. I want to make sure that they are still in working order. I did read about the calculators needing to have a battery in place before trying to run the calculators on a power cord.

Is there something else that I should be aware of?? Note, most of the Ni-CD batteries are 20+ years old and I don't know if there might be an issue with them.

What I have (HP):
Classic/Topcat: 35 (sold), 45, 55 (sold), 65, 67(sold), 80, 97.
Woodstock: 21, 25 (sold), 29C (2) (both sold). Sting: 19C (sold)
Spice/Spike: 32E (2), 33E, 34C, 38E
HP-41: 41C, 41CV (2), 41CX - with numerous modules, books, and a few accessories.
Voyager: 15C
Handheld computers: 75D with 64KB case, 71B (2) (both sold).
Clamshells: 28C, 28S (sold)
Pioneers: 14B, 17B, 20S (2), 21S, 27S, 32S, 32SII, 42S (sold)
Charlemagne: 38G. 48S, 48SX (Sold), 48G, 48G+, 48GX (Sold)
Palmtop: 95LX512KB

John Edry