HP Forum Archive 09

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1.2V NiCd for HP-41? Message #1 Posted by Jürgen Keller on 4 Dec 2002, 5:15 p.m. Does anybody know if I can also use 1.2V NiCd disposable batteries instead of the recommended 1.5V Alkaline batteries for the HP-41? I currently do not have a rechargable battery pack :-(

Re: 1.2V NiCd for HP-41? Message #2 Posted by Emmanuel, Normandy (France) on 4 Dec 2002, 5:44 p.m., in response to message #1 by Jürgen Keller Dear Jürgen, Good idea! I use 4 Sanyo Cadnica N-150N 1.2V 150mAh If you want to replace batteries inside a pack, please use Sanyo Cadnica N-50 AAA. Good luck!

Re: 1.2V NiCd for HP-41? Message #3 Posted by David Smith on 4 Dec 2002, 6:01 p.m., in response to message #1 by Jürgen Keller Yes nicads work fine, so do NiMH cells if you can find them. HP once sold a nicad kit for the machine.

Sure Message #4 Posted by Mike on 4 Dec 2002, 6:27 p.m., in response to message #1 by Jürgen Keller Sure, NiCads work just fine. That's what's in the rechargeable pack.

Re: Sure Message #5 Posted by Jürgen Keller on 5 Dec 2002, 2:40 a.m., in response to message #4 by Mike Emmanuel, David, Mike: Thanks for your advice. Just wasn't sure if 4.8V is enough for the 41. Don't know much about electricity and was confused that Alkaline batteries are 1.5V, but NiCd/NiMH batteries are 1.2V. And, of course, I didn't want to misfeed my calc.

Re: 1.2V NiCd for HP-41? Message #6 Posted by Andreas Müller(GER) on 5 Dec 2002, 6:04 a.m., in response to message #1 by Jürgen Keller I am using NiCd Cells 1.2V/150mA, for over 20 years. One 'Quartet' (manufacturer: Varta) is still working for 23 years in my 41-CV. No corrosion at all. But I have used another 'Quartet' (manufacturer: Panasonic) that showed leakage and began to produce corrosion after using them 5 years. Since I made this experience I only use Varta NiCds for my 41-CV. I actually have 2 'Quartets' in use. Best resgards, Andreas

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