Battery-powered devices are electronic gadgets that operate using batteries as their primary source of energy. These devices can range from small items like remote controls and flashlights to larger equipment such as laptops and electric vehicles. The convenience of being portable and not needing a direct power source makes them popular for everyday use. Batteries come in various types, including alkaline, lithium-ion, and nickel-metal hydride, each with different capacities and lifespans. Many battery-powered devices are rechargeable, allowing users to reuse them multiple times, which is both cost-effective and environmentally friendly.