HP Forum Archive 21

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Classic battery polarity Message #1 Posted by Kiyoshi Akima on 8 Nov 2013, 12:45 a.m. What's the polarity on the two connectors inside the battery compartment of a Classic-series HP? I've got two Classics I'd like to at least test to see whether they still work but I have no battery packs for them. I figure I can wire three AA batteries in series, but which way do I connect them to the calculator? I don't really feel like taking a 50-50 chance. With my luck, I'll hook it up the right way on a dead machine, figure it's the wrong way, reverse it for the other one, and fry a good machine.

Re: Classic battery polarity Message #2 Posted by Thomas Radtke on 8 Nov 2013, 1:21 a.m., in response to message #1 by Kiyoshi Akima http://www.hpmuseum.org/batts/bccls.jpg

Re: Classic battery polarity Message #3 Posted by Kiyoshi Akima on 8 Nov 2013, 1:31 a.m., in response to message #2 by Thomas Radtke Thanks. Somehow I missed that when I was searching the museum.

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