A Battery is a device that converts chemical energy to electrical energy. The first battery was developed by Alessandro Volta in the year of 1800. In the year 1836, John Frederic Daniell, a British chemist developed the Daniell cell as an improved version of the voltaic cell. From that time until today, the Battery has been the most popular source of electricity in many daily life applications. In our daily life, we generally use two types of Battery, one of them is which can be used once before it gets totally discharged. Another type of battery is rechargeable which means it can be used multiple times by recharging it externally. The former is called primary battery and the later is called Secondary Battery. Battery means a number of electro-chemical cells connected together to meet a certain voltage and current level.

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