Battery-operated devices are powered by batteries instead of being plugged into an electrical outlet. These batteries store electrical energy, allowing the device to function without a direct power source. Common examples include remote controls, flashlights, and toys. The convenience of battery-operated devices makes them popular for portable use. They can be used in various settings, from homes to outdoor activities. However, batteries need to be replaced or recharged periodically, depending on the device's energy consumption and the type of battery used, such as alkaline or rechargeable lithium-ion.