Message #1 Posted by Thomas Cox on 9 Nov 2006, 8:46 p.m.
As a shirt-pocket calculator, the HP-6S has served me well for the last several years. I have two different units, one that I use all
the time and the other as a spare. I found that on the daily-use unit when the battery died after about 3 years, I was able to easily insert a more powerful battery, the LR-44, which is about twice as thick as the called-for LR-43. The back fits nicely with the larger battery and I have had no problems with the original unit other than the more frequently used keys have the labeling on the face worn almost off.
The second unit's battery died recently and I noticed that it had a different style battery compartment so that a LR-44 would not fit. But seeing that this was a disposable calculator anyway, and since I had a supply of LR-44 bateries and no LR-43 batteries, I broke off the top plastic retaining pieces and depended on the extra thickness of the battery to hold it in position. Works fine.
Note: The solar cell alone provides insufficient power to operate the display unless the solar panel is very close to a bright light, such as a desk-top lamp.
What I would really like to see is an inexpensive HP calculator with RPN that would readily fit in a shirt pocket. The HP-33S is too large for this. About the largest form factor in a currently manufactured HP that would meet my wishes is the HP-10BII.
I know that various people have wished for a return of the HP-15C, but that is more power than I need. About the only thing that the 6S does not have, other than not being RPN, that I would like is the ability to handle two variable statistics.
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