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16-yr old HP-15C still running on original batteries

Posted by Chuck Yount on 1 Sept 2000, 12:24 p.m.

I bought my HP-15C when I was a sophomore EE in 1984. Its built-in imaginary number capability was a real time-saver in linear circuits. I used it heavily through my undergraduate years and often since then. The amazing thing is that it is still running on the batteries that were in it when I bought it. Previously, I had used cheap calculators that I had to throw away after a year or two, but this is the last calculator I ever had to buy.

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