"Battery-operated" refers to devices that use batteries as their power source instead of being plugged into an electrical outlet. These batteries can be rechargeable or disposable, allowing for portability and convenience. Common examples include remote controls, flashlights, and toys. Many battery-operated devices are designed for ease of use, making them ideal for situations where access to electricity is limited. They can be found in various applications, from household items to portable electronics like laptops and smartphones. This versatility makes battery-operated devices popular in everyday life.