Battery-powered devices use batteries as their primary source of energy. These batteries store electrical energy and release it to power various gadgets, such as remote controls, flashlights, and electric vehicles. The convenience of being portable and not needing a direct power source makes battery-powered devices popular for everyday use. Batteries come in different types, including alkaline, lithium-ion, and nickel-metal hydride. Each type has its own advantages, such as longer life or faster charging. As technology advances, battery-powered devices continue to improve, offering better performance and efficiency for users.