The empty-run protection is a safety feature of the kettle that prevents the kettle from turning on if there is not enough water. This function detects low water levels in the kettle and automatically switches off the heating element to prevent overheating and damage to the kettle. Running on empty protection also reduces the risk of fire caused by the kettle overheating without water. These safety precautions are particularly important in households with children or elderly people, where there is a greater likelihood that the kettle may be switched on without water. When choosing a kettle, you should consider models with empty-run protection to ensure a higher level of safety when using the kettle.