Re: Is the HP 82059D right for HP-91?? Message #4 Posted by Viktor Toth on 3 Apr 2000, 12:02 p.m., in response to message #3 by Erik
The 82059D is almost certainly the correct charger for the HP-91. (I say 'almost' because I never had an HP-91 in my hands, but I have no reason to believe that its charger is different from that of the HP-97... and that one is the 82059D.)
The polarity doesn't matter. It is an AC charger, the current is rectified inside the calculator. It is VERY important, however, to have a working battery pack in the calculator before connecting the charger, because the battery pack acts both as a regulator and a filter.
Viktor
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