How to Check the Age of Your CO & Smoke Detector

When it comes to your smoke detectors, age matters

Angi Staff
Written by Angi Staff
Contributing Writer
Updated May 11, 2022

Difficulty

Easy

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Time to complete

5 minutes

Cost

$0

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  1. UNSCREW THE FRONT PLATE

    Take a look at the back of it. There should be a manufactured date printed or stamped in this area (sometimes it's near the battery compartment, instead).

  2. HOW OLD IS YOUR DETECTOR?

    If your detector was made more than ten years ago, it's time to buy a new one!

  3. OPTIONAL:

    There are number of lithium batteries available specifically designed for smoke and CO detectors. If you need to replace your detector, grab one of these long-lasting batteries at the same time!

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Angi Staff
Written by Angi Staff
Contributing Writer
The Angi Content & Editorial team consists of researchers, editors, and producers who share a love of all things home.
The Angi Content & Editorial team consists of researchers, editors, and producers who share a love of all things home.
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