Medium and large supercapacitors are a type of electrochemical energy storage that can store and release electrical energy quickly. They are offered in different sizes or capacitance ranges. Medium supercapacitors typically have capacitance values in the range of a few hundred Farads (F). These devices are capable of storing moderate amounts of energy and can deliver high power outputs. Applications include automotive, renewable energy and industrial applications. Large supercapacitors have capacitance values of several thousand Farads. They can store considerable amounts of energy and are used in applications that require high power and/or long-term energy storage, such as public transportation, grid energy storage, heavy machinery, and industrial equipment. They complement batteries and other energy storage technologies, finding applications in various industries where rapid energy storage and release are required.