> corrosive supercaps

That's new to me Roman. Most supercaps have a solid dielectric. Can you
quote a make that does not ? The main failure mode is by increased leakage
afaik. This is 'helped' by the long (100ft or more) length of very thin
(10 microns) tape dielectric in them. The slightest material fault causes
leakage or breakdown (at ridiculously low voltages - like 1.5V). Afaik
they don't age electrically, only material breakdown does them in.

Peter

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