I have a small circuit with a 100uF cap that is usually charged with 6V. However it can be accidentally charged at -6V for few hours per day. I cannot add a diode in series as the cap must be able to discharge through a load. Would a diode or a Schottky in parallel be enough to protect it against reverse voltage? I mean, is -0.7V or -0.2V bad for an electrolytic (or tantalum) cap over a long time?
Or a non-polar electrolytic would simply be a better choice?
Octavio