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People who are nocturnal and work at night shouldn't strain their eyes on something little. That's when the battery comes in handy, you put the battery in and it powers the new lighting device. Now you don't have to use candle light that is very dim and blows out. When you need to communicate with someone far away, you need easy transportation of energy; the electric battery is the thing to send electrical waves through the air.

Although an early form of battery may have been used in antiquity, the modern development of batteries started with the Voltaic pile, invented by the Italian physicist Alessandro Volta in 1800. Since then, batteries have gained popularity as they became portable and useful for many purposes.