Would the HP-15C Limited Edition Firmware Age Away?

[Dan Grelinger]

It turns out my Asian acquaintance has two HP-15C LEs that he has squirrelled away, and they both stopped working. However, he was able to get one of them working by switching batteries around. The same set of batteries won't get the other calc working. I have asked him to confirm that he is using a brand new set of batteries, as I suspect that the batteries that work in one calculator are marginal and won't work in the other.