Cleaning battery contacts

[anetzer]

(04-13-2014 05:23 PM)sylvandb Wrote:  If you have the contacts out then you could use some solder (lead-free if you like) to tin the contacts. This requires substantial heat and beware

My case is a HP-71: Corrosion. Cleaned the contacts thoroughly. Now I have intermittent conductivity between the discs affixed to the spring pairs 1-2 and none on 3-4 and on the metal band between 2-3. Just to find out, whether the machine works, we strung strips of aluminum foil between the contacts and the calc booted just nicely. So yes, it's the contacts...

I read somewhere, that covering battery contacts with a layer of solder is only advisable in devices with low power consumption? IF that is true, I would guess that every calculator covered here falls into that category...

What would the high council of the forum advise:

As it is rather easy to free the battery contacts from the plastic housing on an HP-71, is it advisable to give them a fresh layer or solder or would you go for other solutions (e.g. conductive silver pen, pole grease; contact spray)

Thanks a lot!

a.