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I build replica batteries for old portable radios, and while scanning through a 1946 Philco battery catalog, I found this item. Freezers had built-in power-outage alarms back then? Bill

Just saw the thread in the archives section. And I'm not sure if I posted this in the right section--technically it uses old parts, but the computer-controlled interface could put it in the modern category. I was just thinking--wouldn't it be great to add a touch-screen interface and mount it...