How Long Does a Smoke Detector Battery Last?

Stay safe with a smoke detector.

Ensure your family's safety by maintaining a working smoke detector in your home. Placed in several locations throughout the home, including near bedrooms and living areas, working smoke detectors are a necessary safety tool.

Significance

Batteries power smoke detectors and allow them to detect smoke and warn building occupants of a possible fire. Replacing batteries when necessary represents a necessary household chore.

Replacement

Most smoke detectors begin to beep or chirp when the battery starts to decline in function. This indicates a need to replace the battery immediately. Test smoke detectors monthly to ensure they function properly. Check with the manufacturer for specific recommendations on battery replacement intervals.

Considerations

Use an alkaline battery if possible. Replace the batteries in all smoke detectors at the same time on a specific schedule; for instance, you can change all smoke detector batteries when the clocks change in the fall or spring. Batteries should be changed at least annually.

References

• U.S. Consumer Product Safety Commission: Test All Smoke Alarms and Annually Replace Batteries
• The University of Tennessee: Smoke Detector Placement and Installation