Capacitor vs. Ultracapacitor — What's the Difference?

A capacitor is a device that stores electrical energy in an electric field. It is a passive electronic component with two terminals.

A supercapacitor.

A device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator.

An electric circuit element typically consisting of two metallic plates separated and insulated from each other by a dielectric, used to store charge temporarily or to filter signal frequencies. Also called condenser.

(electronics) An electronic component capable of storing electrical energy in an electric field; especially one consisting of two conductors separated by a dielectric.

A device used in electronic circuits to hold electrical charge, consisting of two conducting plates separated by a nonconducting (dielectric) medium; it is characterized by its capacitance.

An electrical device characterized by its capacity to store an electric charge