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How Often To Change Smoke Alarm Battery. Or set a calendar reminder for. Some modern smoke detectors come with a 10-year lithium-ion battery.
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If your alarms use regular batteries swap in fresh batteries at least once a year. Some detectors use lithium batteries that will last for ten years. How do I change smoke detector batteries.
After taking off the cover remove the battery case if one is present and take out the old battery.
When a smoke alarm sounds get outside and stay outside. If your alarms use regular batteries swap in fresh batteries at least once a year. Some detectors use lithium batteries that will last for ten years. If your smoke alarms are powered by a nine-volt battery the battery should be replaced every 6 months while the detector itself should be replaced once every 10 years.
