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11 $begingroup$ I have a high voltage (750V) high value electrolytic cap about as big as my forearm. It has been in my storage box for about 20 years. In general, do electrolytics degrade under normal storage conditions ie room temperature over such a time? Not quite sure what type it is, but probably a standard Aluminium foil, not solid state. If they do degrade, what characteristics degrade? electrolytic-capacitor storage share | improve this question asked Mar 20 at 10:56 Dirk Bruere Dirk Bruere 5,530 5 29 61 $endgroup$