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Classic battery contacts


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Post: #2
04-08-2012, 10:38 AM
james summers Offline
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Posts: 137
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Joined: Jul 2006

Hi everyone

Any tips for the replacement of a broken battery contact in an HP 45?

As acquired the battery was very corroded (to the extent that it was quite a difficult job to even get the battery compartment cover off) and the +ve contact was corroded through at the point where it passes through into the body of the calculator. The -ve contact is much better but is still perforated in quite a few places.

Would a thinner sheet of half hard copper as suggested by Randy for replacing Spice contacts have the necessary springiness for the job?

Cheers

James

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Post: #3
04-08-2012, 01:33 PM
Randy Offline
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Posts: 883
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You'll find the classic contacts to be ~0.006-0.007 inches, same material as the spices. Only difference is the gold plate on the classics, went to bright tin for the spices. Price pressure, no doubt.

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Post: #4
04-08-2012, 01:45 PM
james summers Offline
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Posts: 137
Threads: 11
Joined: Jul 2006

Thanks Randy.

I'll track some down and get metal bashing!

Cheers

James

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