Batarya, or battery, is a device that stores electrical energy for later use. It converts chemical energy into electrical energy through electrochemical reactions. Commonly found in everyday items like remote controls, smartphones, and electric vehicles, batteries come in various shapes and sizes, including AA, lithium-ion, and lead-acid. Batteries consist of one or more cells, each containing positive and negative electrodes and an electrolyte. When a battery is connected to a circuit, electrons flow from the negative electrode to the positive electrode, providing power to the connected device. Proper disposal and recycling of batteries are essential to minimize environmental impact.