How to Change a Backup Smoke Detector Battery

Smoke detectors are an essential part of home safety and security, alerting you to any detected fire smoke. The alarm will release a high-pitched beeping noise if smoke is detected. Hard-wired smoke detectors have back up batteries in case the power gets cut, the devices will continue to work. If the batteries in the smoke detector are not in working order, the smoke detector becomes useless and the results of that could be devastating. Be sure to check the battery life once a month, replacing the batteries at least once a year.

Things You'll Need

Step ladder
Smoke detector battery

Screwdriver

Instructions

- 1
  Set up the step ladder below the smoke detector.
- 2
  Twist the smoke detector to unhinge it from the ceiling or wall. Be careful not to pull down on the smoke detector and rip the hard-wiring.
- 3
  Locate the battery compartment and remove the battery. You may need a screwdriver.
- 4
  Replace the battery with a fresh one and replace the battery cover. Twist the smoke detector against the holder on the ceiling or wall to secure the smoke detector back in place.
- 5
  Test the new battery according to the smoke detector’s instructions.

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