I recently read that the leakage current in an aluminum electrolytic capacitor will increase with higher applied voltge. This seems reasonable. In fact, I have a vague memory of having measured leakage current and finding that it rises sharply as the applied voltage nears the rated voltage.
But I also remember reading that when connecting electrolytics in series, there is a danger of unequal voltage division which might overstress one of the caps.
This seems to present a contradiction. If one capacitor takes more than its fair share of the voltage, wouldn't that cause an increase in leakage current and a subsequent reduction of the voltage?