HP 12C - refresh batteries or not?

[grsbanks]

Not sure why you're even asking the question

Batteries are cheap so you might as well replace them to be on the safe side. They've been known to last for well over 10 years but do you want to risk leakage if they are the original ones?

Speaking of SwissMicros, have you considered the DM42, which is due to be released very soon (as in possibly within the next week)? Similar form factor to the HP-42S and a functional clone of it but on steroids (more memory, much faster, USB connectivity, really good 400x240 resolution LCD...)