Today is a good day - an HP-28S saved

[bxparks]

(04-15-2024 11:46 PM)rprosperi Wrote:  Enjoy your 28S, enjoy learning RPL, and even enjoy thinking of your Dad learning RPL, but get some other brand of N cells in that machine ASAP.

There are people on these forums who say that 2/3 size AAA NiMH batteries are compatible with size N batteries. That could be the best option if that works.

I have personally replaced almost all my batteries with NiMH, about 200 of them according to my spreadsheet. Duracell alkalines seem to leak the worst, but other brands also leak. The only things that I have found not working with NiMH are smoke and carbon monoxide detectors, which are calibrated to the alkaline voltage curve.