HP 41C Battery Contacts (Cleaning?)

[Eddie W. Shore]

(09-23-2014 01:54 PM)ElectroDuende Wrote:  

(09-23-2014 01:10 PM)Eddie W. Shore Wrote:  Is there anything I can use to clean off corrosion (or rust?) the golden battery contacts of the HP 41C without having to take the calculator apart?

The problem here is taht the copper layer on the flex circuit is quite thin, so there are a lot of chances that it has been completely destroyed by the leak. You can start with a wet cotton to remove any leak rest and then gently polish with metal cleaner. If you find that the copper layer is removed, The Calculator Store has a repair kit that will let your battery contacts as new.

Regarding the wet cotton, would just water be sufficient?