How Long Do Batteries Last In A Smoke Detector. The National Fire Protection Association recommends replacing smoke alarms every 10 years. 9 Volt Lithium Battery.

The National Fire Protection Association recommends replacing smoke alarms every 10 years. But simply having smoke alarms in your home is not enough - you have to be sure that they are working. Long-life battery smoke detectors last up to 10 years before they need a replacement.
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Ad Affordable Prices Broad Selection Freshness Guaranteed. A smoke detector with a lithium battery or a hard-wired smoke detector can last 10 years. Even though 9-volt batteries are widely available and typically cheaper if purchased in quantity the vast majority of smoke alarms still utilize them. 10-year-life lithium battery powered but not mains-powered smoke alarm.
