I have an old HP 41CV that I have had since college (vintage 1984). When I checked recently, there was a fair amount of corrosion on the contacts at both ends of one of the batteries. Strangely, I don't see anything leaking from the battery. I can't recall the last time I changed batteries - it might have been 6 or 8 years ago. Everything still works.
What is the best way to clean the contacts? Alcohol and a cotton swab?
Also, I've picked up an older made in the USA vintage 12C. I've not received it yet - but from the pictures it looks like 1 of the 4 rubber feet are missing. I'm not overly picky about these things. Any chance I could find something reasonable at a hardware store to replace these feet? I'm thinking I might replace the 2 on that side so that the thing rests firmly.
Finally, what's the best place to get replacement batteries for the HP41CV and 12C. I think I went to Radio Shack last time - they seem to be a bit expensive. Can you get these batteries from Amazon or other online places?
Thanks,
Kevin