Brand

First Alert and BRK: date, expiry and replacement

Quick answer

AlarmSwap does not have a First Alert or BRK model page yet. The date-and-expiry guide says where First Alert prints the manufacture date and when First Alert says to replace the alarm. Those lines are below, with their sources.

Last checked October 31, 2026

Model pages

No First Alert / BRK model page is on the site yet. The guide notes below are the sourced lines we do have.

From the guides

Find your alarm's date & expiry · First Alert

Where the date is: The manufacture date is on the back of the smoke or CO alarm.¹
How long it lasts: Replace once it is 10 years old or older, and right away if it fails its test.¹

Other brands

Kidde Kidde model pages on AlarmSwap: where the date is, when the alarm is due, and which adapter those pages cite.
Firex Firex model pages on AlarmSwap, including the replacement and adapter facts cited from Kidde for these alarms.

Sources

First Alert — 10-Year Battery Alarms (How to check your alarms) checked 2026-10-31

Facts are restated in our own words. If a source page changes, the "checked" date tells you how fresh our reading is. Spot something out of date? Open an issue on GitHub.