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 …

How to stop a chirping smoke detector. Remove, install and replace a new battery (9 volt battery) in a First Alert plug in smoke detector and carbon monoxide...

Scott shows how to easily replace the battery in a First Alert smoke alarm, ensuring your family's safety with a quick DIY fix.

Oct 19, 2024 · 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 …

Dec 16, 2025 · This First Alert battery replacement guide seeks to walk you through how to easily and quickly change batteries in your detector on your own.

Master the complete process of replacing your First Alert alarm battery, including essential preparation and clearing the low-battery memory.

Jul 21, 2025 · Replacing the battery in a First Alert smoke alarm is important. Start by removing the alarm from the ceiling or wall. Next, twist off the battery cover. After that, take out the old battery and …

Aug 22, 2024 · In this article, we will walk you through a step-by-step process to change the battery in your First Alert smoke detector. Whether you are a homeowner, a tenant, or simply someone who …

Apr 7, 2025 · However, many users make common mistakes during this process that can lead to ineffective alarms. In this article, we will explore these mistakes and provide helpful tips to ensure …

Check the chart in this article or your user manual to find the right replacement batteries, typically 9V or AA. After you’ve bought new batteries, it’s time to install them and remount the unit.