Batteries are not always the best choice as energy storing systems. It takes hours to recharge even though they have high energy density. In comparison, ultra capacitors can recharge in seconds or minutes even though they have less energy density. They are used in various application fields such as electrical house appliances, torch, medical and personal care devices, kitchen appliances, industrial imaging devices, road signs with solar energy supply, retail transaction devices and emergency communication devices with solar energy source along road by means of being able to switch more than a million times, high efficiency and being environment friendly.
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