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Batteries convert chemical energy into electrical energy through reactions between electrodes and an electrolyte. Electrons flow through an external circuit, powering devices from flashlights to phones to electric cars.

What makes batteries so powerful in modern life is portability. They let energy travel with us. The history of battery development is, in many ways, the history of making modern tools more mobile, personal, and independent from fixed wires.


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Reference:

Wikipedia: Battery (electricity)

image for linkhttps://en.wikipedia.org/wiki/Battery_(electricity)

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