Re: Capacitors. Is physical size important?
It takes months (or perhaps a few years?) for an electrolytic oxide layer to deteriorate significantly, even when sitting on a shelf unused. Any leakage current will help preserve the oxide. Don't worry about a few hours or a few weeks at less voltage. The problem is most likely to show itself when a cap is re-used in a new circuit, having been recovered from a scrapped circuit which used it for years at a lower voltage.
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