How to Replace 9V Batteries on Smoke or CO Alarms - First Alert
Some First Alert or BRK alarm models run on a 9-volt battery or backup battery. The battery should be replaced once per year. In this article, you’ll learn how to replace the 9V battery on your smoke …
Replace Batteries on a First Alert or BRK Detector - YouTube
This video will show you how to replace 9V and AA batteries on First Alert and BRK smoke and Carbon Monoxide detectors.
Watch How to Change Batteries First Alert Smoke Alarm.mp4 on ...
Scott shows how to easily replace the battery in a First Alert smoke alarm, ensuring your family's safety with a quick DIY fix.
First Alert Smoke Alarm 9120B Battery Replacement - iFixit
Follow this guide to fix your First Alert Smoke alarm. This fix will stop the First Alert Smoke alarm from beeping when your battery is low. Make sure you have your 9V battery in hand and a helper to make …
How to Change the Battery in a First Alert Smoke Alarm
Dec 9, 2025 · Master the process of replacing your First Alert smoke alarm battery with proper model identification, safe access techniques, and essential post-replacement…
First Alert Battery Replacement for Smoke & CO Detectors
5 days ago · This First Alert battery replacement guide seeks to walk you through how to easily and quickly change batteries in your detector on your own.
All First Alert® and BRK® Smoke Alarms conform to regulatory requirements, including UL217 and are designed to detect particles of combustion. Smoke particles of varying number and size are …