Re: 82033A Peripheral batteries? Message #9 Posted by Andrés C. Rodríguez on 25 Feb 2000, 9:34 p.m., in response to message #8 by G Weisbrot
I agree with Viktor, NiCds usually offer 1.25 V, and may even approach 1.3 V while just charged. (You can measure yours easily to see if this is the case).
Alkalines may be a little over 1.5 V when new, but a HP41 will run for months with a new set, and in average will be powered by 1.4 V on each cell.
So I would prefer four than five NiCd.
If you still think five is better, you may (at your own decision and risk) connect one standard silicon diode (1N4001, for instance) in series (forward biased) with the pack. The diode will in fact provide a voltage drop in the range of 0.65 V to 0.7 V.
The final voltage will be around 5.5 V, quite appropriate.
CAUTION: Of course, this suggestions are no guarantted to work, take them just as ideas on the matter.
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