An alkaline battery produces electricity through a chemical reaction. The manganese dioxide in the cathode undergoes reduction, while the zinc in the anode is oxidized. This process releases electrons that flow to power devices. Alkaline batteries offer reliable energy for everyday electronics.
When an alkaline battery is connected to a device, a chemical reaction occurs. Zinc oxidizes at the anode, releasing electrons. These electrons flow through the external circuit, providing power to the connected device. Meanwhile, manganese dioxide at the cathode is reduced, accepting electrons. This process generates a constant electric current until the reactants are depleted.
The efficiency and longevity of alkaline batteries come from their stable chemistry. They can provide a higher energy density compared to other types of batteries, like zinc-carbon batteries. Alkaline batteries are widely used in various applications, including remote controls and flashlights.
Understanding how alkaline batteries work sets the stage for discussing their advantages and disadvantages. It also leads to exploring alternative battery technologies, such as lithium-ion, which offer different benefits and use cases.
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