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How to Change Smoke Alarm Batteries

Man opening smoke alarm in ceiling.

Last updated September 7, 2023

Knowing how to change a smoke alarm battery is essential to maintaining a safe home. If your smoke alarm starts “chirping” or giving off short “beeps,” it usually needs a new battery change. The first step in learning how to change a smoke detector battery is determining which type of alarm you have. Battery smoke detectors run solely on batteries. Hardwired smoke detectors run on electricity, but they also have a backup battery for power outages. When you hear a hard-wired smoke detector beeping, it means you need to replace its battery. This Home Depot guide gives instructions on how to change a smoke detector battery and how to turn off a smoke alarm.

SHOP SMOKE ALARMS NOW

Difficulty:

Beginner

Duration:

Under 2 hours

Project Guide
DIY Workshops
Home Improvement Ideas
DIY Workshops
Homeowner 101 Indoor
Home Safety & Security
Batteries
Safety Gear
Fire Safety

Table of Contents

  1. Remove Cover

  2. Replace Battery

  3. Test Smoke Alarm

  4. Smoke Alarm Tips