For the most part, it is clear what EDLCs are and how they differ from batteries and pseudocapacitors, both of which use faradaic reactions to store charge6. There are important considerations for microporous activated7 and carbide-derived carbons (CDC)8 with average pore diameters of about 1 nm. These materials can usually accommodate one ion or a few ions per pore, since ions can lose their solvation shell in part or entirely while entering the pores8. Although charge storage in these materials is purely electrostatic, they are traditionally called EDLCs, despite the fact that no classical Gouy–Chapman–Stern double layer is formed. A more accurate representation is to consider their charge storage process as arising from the electrosorption of ions by an oppositely charged carbon sponge, similar to physisorption of molecules by the same porous carbons, but driven by electrostatic force. It was shown that a theoretical model that more accurately describes this effect is the electric wire-in-cylinder capacitor instead of a parallel plate capacitor9.