Have you ever changed the battery in a wall clock or TV Remote? What battery did you use? Chances of you shopped (either online or in a store) for a tiny cylindrical battery in the name of “AA Batteries”. There are several chemistries, electrode types, electrolytes, shapes, and sizes in both Primary and Secondary Batteries. Hence, we call Primary Batteries Non-Rechargeable Batteries or Disposable Batteries and Secondary Batteries as Rechargeable Batteries. While recharging, we apply electrical energy to rearrange the chemistry of the cells so that we can use them once again. While using Secondary Batteries, we use their chemical energy to provide electrical energy to a load. In contrast to this, in a Secondary Battery, we can reverse the electrochemical process by “recharging” them. So, we have to discard these batteries and replace them with new batteries. In a Primary Battery, the electrochemical process is irreversible i.e., once we utilize all its chemical energy, there is no way to reverse it. The basic classification of batteries consists of only two types Primary and Secondary. Technically, a battery consists of one or more cells, the basic electrochemical unit that is made up of electrodes (anode and cathode) and an electrolyte. What is a Battery? A Battery is an electrochemical device that converts chemical energy to electrical energy.
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