CAPACITOR TECH TALK Caps for all seasons

Whether it's for ghetto blasting car audio or super-efficient buses our supercap man John Miller can answer your questions.
One of the strongest claims for electrochemical capacitors is that they have exceptionally good power performance, particularly at low temperatures. Are they really more powerful than lead-acid batteries at comparably low temperatures, and if so, why?
The answer is an emphatic "Yes!" To understand why, we need to review what we know about the fundamentals of reaction kinetics, charge storage mechanisms in electrochemical capacitors and batteries, and major design differences between the two . . .