Supercapacitors are used in applications requiring many rapid charge/discharge cycles, rather than long-term compact energy storage: in automobiles, buses, trains, cranes, and elevators, where they are used for regenerative braking, short-term energy storage, or. . Supercapacitors are used in applications requiring many rapid charge/discharge cycles, rather than long-term compact energy storage: in automobiles, buses, trains, cranes, and elevators, where they are used for regenerative braking, short-term energy storage, or. . backup application to provide power to RTC circuit in electronics when the power source to the syste is disconnected. Self-discharge characteristics is one of the important char cteristics to determine the backup time. Self-discharge current is often confused with leakage current characteristic. . Abstract—The literature on the self-discharge of supercapacitors is reviewed, the advantages of electrochem-ical supercapacitors over batteries are formulated. The principal disadvantage of the electrochemical super-capacitors is their rapid self-discharge. A study of self-discharge of. . A supercapacitor (SC), also called an ultracapacitor, is a high-capacity capacitor, with a capacitance value much higher than solid-state capacitors but with lower voltage limits. It typically stores 10 to 100 times more. . storage devices driven by fun-damental forces is briefly introduced and put into perspec-tive. Causes and observed effects as well as possible conse-quences and modifications in support of a therapy of these effectsaredescribed. Supercapacitors are breakthrough energy storage and delivery devices that offer millions of times more capacitance. .