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Chris the batteries are most probably way past their use by date. I have only one AC adapter. Both calculators were working when the batteries were OK.
My first calculator was a HP35 in 1971?. I wore it out! At that time they were $135 when my salary was about $50 a week. At Kodak we had the mechanical Marchant caculators. They divided by subtracting. If you did not move the decimal point it would crank all day to get an answer. Tell that to the young people today and they won't believe you.
Bert
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