Enter the characters you see belowSorry, we just need to make sure you're not a robot. For best results, please make sure your browser is accepting cookies. Show Type the characters you see in this image:Try different image Conditions of Use Privacy Policy © 1996-2014, Amazon.com, Inc. or its affiliates The First Alert BRK smoke detector is wired directly into your home’s electrical system. These mechanisms come with a battery backup, as well as a mute button. The battery backup ensures the warning system works, even if the power is out. The mute features can silence nuisance or unneeded alarms created by shower steam or cooking smoke. There is no question these modern, innovative alarms are ideal for protecting your family and home. However, the quandary of how to change the battery comes up often. Many homeowners wonder how to ensure the battery backup power continues working if the unit is hardwired into their home’s electrical system. As a result, they may call in the pros a few times each year to take care of this process. While the team at Teague Electric has no problem helping you out with routine battery changes, this is a job you can handle on your own. Here you will find a quick tutorial and step-by-step guide to easily and quickly ensure your batteries continue to work without fail. Step 1: Remove the Smoke Alarm from the Mounting Bracket The first step is to remove the smoke alarm from the mounting bracket. If the unit is locked onto the bracket, you will have to deactivate the bracket lock. Step 1a: Deactivate the Bracket Lock
Step 2: Remove the Locking Pin Use the flathead screwdriver to remove the pin from the battery compartment lock. (If you are planning to relock the compartment, which is typically wanted for commercial properties, then be sure to save it). Step 3: Remove and Replace the Batteries While it may be tempting to purchase cheap batteries to save a bit of money, it is best to invest a little more money. Purchase some high-quality batteries that will last for at least six months. Remember, these are backup batteries, so they won’t be used all the time. Step 4: Replace the Pin to Lock the Battery Compartment The battery compartment can be relocked by replacing the pin and closing the battery door. Reinsert the locking pin you removed in the lock. Step 5: Test the Smoke Alarm Prior to reattaching the unit to the base, make sure to test it to ensure the batteries are working. Once you are confident it is working you can reattach the smoke alarm to the mounting bracket. It is a good idea to change the batteries a few times a year. This will help ensure the smoke alarm continues working properly and be able to protect your home, family or business. Make sure that if your smoke detectors are connected to a home security system, you contact your monitoring company to put the system on test and possibly power the system down during this process. This will help to avoid a false alarm to your fire department. Español A working smoke alarm cuts your risk of dying in a home fire in half. Nearly all alarm failures are caused by missing or dead batteries. For the best protection, install a combination hard-wired alarm with battery back-up.
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For more tips like these: How do I open my First Alert to change the battery?Location: Front face of alarm in the bottom left corner. Location: Flip the front cover open and replace the 9V battery.
When should I replace my First Alert 9120B?The First Alert 9120B Hardwired Smoke Alarm with Battery Backup: This smoke detector is powered by a 9-volt battery. The battery itself should be replaced every six months. The actual alarm should be replaced every ten years.
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