Voyager battery lifetime

[Hans-Peter]

I inherited an HP12c from my father who died 20 years ago. Now I had to change the battery and it had a label inside the lid with my father's last battery change March '91. I've used the calculator from time to time, most recently about half a year ago. It only had three slight traces of corrosion on the contacts, which I was able to wipe away with a brush. The batteries were Energeizers. That's different from the power-hungry HP35s.

Hans-Peter