I hope this question hasn't already been done to death...
I got my first classic recently, an HP45, and it works fine on a charger. I found a new battery pack at a local bookstore, but I think the spring contacts in the calculator are too corroded to make good contact and charge the pack. I have tried using sandpaper and a knife, but the corrosion is very stubborn and I do not want to hurt the contacts. Any other ideas? Will I need to replace the contacts? I don't want a Frankenclassic, but if that's the only option, so be it.
The other question I have is regarding the battery pack. It has never been used. I bought it in the original packaging last week, but what I don't know is if the cells are still good after all of this time. Should I rebuild it, or address the contact problem first and then see if it will hold a charge?
Thanks.
-Steven