Back in 1987 a professor of mine purchased an HP-28S which he immediately loaned me after purchase to play with over Christmas break (he not being an HP person.) After I gave it back to him, he placed it in his desk, and there it sat..... for 22 years, never again touched. He gave it to me this last weekend, and, with fingers crossed, I opened the battery compartment. Perfect. No leakage! A mint unit with only about 20-hours of my own time on it. Woohoo. :)
Lucky Day
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