A battery operates by converting chemical potential energy into electrical energy. All batteries have same components – battery cell (metals), two electrodes (cathode and anode), electrolyte solution (liquid or paste) that surrounds the electrodes and packaging. The chemical reaction that occurs in the battery is at one of the electrodes. The type of battery depends upon the chemicals, especially metals, used to make up that battery. The materials that are used to produce the battery depends upon battery’s application requirement. The most common types of batteries are alkaline, Li-ion, Li-PO, NiMH and Lead-acid. The working principle of battery is same, regardless of which metals are used in their make-up, as long as the reaction is occurring between the two metals.
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