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Recommanded NiMh battery cells for HP82162A
09-25-2017, 10:43 AM
Post: #19
RE: Recommanded NiMh battery cells for HP82162A
Hi Dieter,

(09-25-2017 07:36 AM)Dieter Wrote:  Re. the 5,8 V 4,94 V thing: this is the first time I hear of a NiMH battery where charging substantially reduces the voltage. That's hard to believe, I'd say there was something wrong with the 5,8 V measurement. But you're the only one how can know. #-)

Charging did not reduce the output, repeated use of the calculator and card reader did. I just can seem to bring it back to it’s original output value of 5.8v. I am positive it was 5.8v. I even checked the next day after extensive use of the card reader and the DVM read 5.0v or 5.1v.

(09-25-2017 07:36 AM)Dieter Wrote:  Right. There is not even a rectifier, the output is AC.

Worthy to note that my power adapter specifies an output of 3VA/8V.
I have no way of measuring the current, but the AC output of mine is 12V!
It’s a 82066B Eurocharger.

(09-25-2017 07:36 AM)Dieter Wrote:  Yes. You should take a look at this site, also consider the links down the page. But note that there were different versions of the 82120A which may have different electronics inside. Early samples featured a 5 V regulator and other differences (e.g. here), so you have to check what you got!

Although I can’t read German, I can tell you that my battery pack is the one from your first link with the 2-prong outlet. Not the 3-prong one seen on the second link.

Engineer & Senior IT Executive
Tall-Key HP41CL, CV, CX, 82162A Printer, 82143A Printer, 82160A HP-IL, 2 Card-Readers, Modules, Wand, HP50g.
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RE: Recommanded NiMh battery cells for HP82162A - Neve - 09-25-2017 10:43 AM

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