25 Smoke Detectors Save Lives Smoke Detector Checklist Go over this checklist with a grown-up. Early warning makes a difference. We have smoke detectors near where we sleep. We make sure grandparents have working smoke detectors in their home. We change the battery twice a year on the days we change our clocks. Do you know what a smoke detector is? It is very important because it lets you know when there is a fire in your home - even when you are asleep!
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