HP Forum Archive 10

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HP 41 Battery Pack Message #1 Posted by Howard on 24 Feb 2003, 8:48 p.m. I have a battery pack for my HP41. It came with the machine when I bought it. It has never been used. I don't have the charger for it. Do these packs deteriorate? What is the charging voltage and can you recommend a method of charging this pack. I don't want to go to the expense of buying a charger if the battery pack is shot. I have a battery charger for HP 45 and Hp 33C. Can I take leads off either of these and connect to the battery pack? If so what is the polarity? Thank you in advance.

Re: HP 41 Battery Pack Message #2 Posted by Randy Sloyer on 24 Feb 2003, 9:53 p.m., in response to message #1 by Howard Yes, all batteries have a finite life, even when not used. If the pack is a rechargeable ni-cad (82120A), you'll need to re-cell it with 1/3 AAA cells as the original 1/2 N cells are no longer made. The proper charger is HP 82059B, output is 8 VAC @ 3 watts.

Re: HP 41 Battery Pack Message #3 Posted by Steve on 24 Feb 2003, 11:38 p.m., in response to message #2 by Randy Sloyer I have an 82059D charger with the same specs, I wonder how it differs from the B model? Also, where do you find 1/3 AAA cells? Is there an article on how to open up the 82120A?

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