First Alert BRK Brands Hardwired Ionization Smoke Alarm with 10-Year Sealed Battery - 9120LBL

  • First Alert BRK Brands Hardwired Ionization Smoke Alarm with 10-Year Sealed Battery - 9120LBL
  • First Alert BRK Brands Hardwired Ionization Smoke Alarm with 10-Year Sealed Battery - 9120LBL
10 Year Battery Smoke Detector
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Hardwired Smoke Alarm with Battery Backup

The First Alert 9120LBL Hardwired Inter-Connected Smoke Alarm with Lithium Battery-Backup is a great choice when it comes to affordable smoke alarms. In the event of a power outage, this smoke alarm is equipped with a 10 year sealed battery back-up.

Ionization Sensor Reliably Detects Flaming Fires

The First Alert 9120LBL Hardwired Smoke Alarm with Battery Backup comes equipped with an ultra-reliable ionization sensor to provide the earliest possible warning of a fast-flaming fire. The sensor is optimized to detect flaming fires, such as those caused by paper, kitchen grease, and other fast-combusting materials. This smoke alarm also implements Smart Technology to drastically reduce the number of nuisance alarms triggered.

Gasket-less for Easy Installation

To facilitate hassle-free installation, this smoke alarm features a perfect mount system that includes a base and a mounting bracket. This keeps the alarm secure over a wide rotation range that allows for true alignment.

Sealed Battery Backup for Detection During a Power Outage

This smoke alarm is designed for hardwired installation, but it also features a ten year sealed battery backup that helps ensure continued functionality in the event of a power outage. The unit comes with a 9-volt battery and features a pivoting, easy-to-access battery drawer that allows you to replace the battery without dismounting the alarm.

Latching Alarm Indication

In addition to functioning independently, this smoke alarm can also integrate with up to 12 other First Alert or BRK hardwired alarms for coverage of larger spaces. It also integrates with up to six other compatible devices, such as bells, horns, and repeaters. If one alarm in the series is triggered, they will all sound. The alarm features a latching indicator to identify which unit triggered the alarm, alerting you to the area of danger.

First Alert BRK Brands Hardwired Ionization Smoke Alarm 9120LBL

Hardwired Smoke Alarm with Battery Backup Features:

  • Ionization smoke sensor is optimal for detecting fast flaming fires.
  • Loud 85dB alarm.
  • Tamper resistant locking pins.
  • Single button silence/test.
  • Ten year sealed battery to keep alarm functioning during power outage.
  • Open mounting design for easy installation with side load battery compartment for quick replacement.
  • Interconnectable up to 18 units (12 smoke, 6 CO/heat/relay).
  • Emits T3 Pattern.
  • 10 Year Limited Warranty.
  • Product Dimensions (LxWxH): 5.6 x 1.9 x 5.6 in.
  • Product Weight: .6 lbs.
Product Specs
Click Here to Write a Review for this Product. Review

Average Rating Based on 34 reviews: Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 (5)

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Saved me $100s - 02/15/2019
Reviewer: Edward Town
The six hard wired 9120s in my condo failed. No surprise, they were 5 yrs old. An electrician said he'd replace them with 10 yr battery models for $450. Then I found these they used the same wiring connectors and I installed all 6 in less than a half hour. I saved over $300. I like my electrician but not that much. Thanks First Alert.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Saving Lives - 02/05/2019
Reviewer: Linda Mabry
Easy to install, meets new law requirements.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Smoke Alarm - 01/04/2019
Reviewer: Christine Sisk
Product was shipped quickly and very easy to install

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 10-YR Lithium Battery Smoke Alarms - 10/09/2018
These 10-year Lithium Battery Smoke Alarms are great replacements for the 9-volt battery units. They are easy to install and no more low battery chirping.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Easy Upgrade - 07/07/2018
Reviewer: James Frost
I have a newer house, which the builder equipped with the 9v power backup version of these alarms. I hated changing all those batteries every six months. And if I forgot to do it and one started chirping at 2AM from a low battery, I had to figure out which one it was, which isn't always easy. When those older detectors finally reached the end of their lives, I decided to spend a little more on the hardwired version that also comes with a 10 year battery. So glad I did. These were plug and play compatible with the 10 year old BRK/First Alert wires and even the mounting brackets are still the same. It was literally remove/unplug the old one, plug in the new one, twist it into place and pull the plastic tab that kicks on the backup battery. I replaced all 10 detectors in less than an hour. And no more battery changes or 2AM beeping.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - 06/18/2018
Reviewer: Joe Pearce
Installed and all are working well

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - 05/08/2018
Reviewer: John Gagliardi
Exactly what I ordered, works great

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Smoke alarm - 04/16/2018
Reviewer: nick berning
Very easy to put up uses same wire harness that was installed in 2001 10 year sealer battery.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - 04/09/2018
Reviewer: Mallory Lynch
prompt and excellent service.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - 03/23/2018
Reviewer: Mary Brabham
These replaced ten-year old detectors and snapped into place perfectly. Easy install

Read All Reviews
Q: What is the proper placement of smoke alarms?
A: It is important that you have the proper placement for your smoke alarms. Install your alarms at least 20 feet from appliances like furnaces and ovens, which produce combustion particles. Alarms should be at least 10 feet from high humidity areas like showers and laundry rooms, and at least 3 feet from heat/AC vents. Be sure to install a smoke alarm in each bedroom, one at the top of each stairwell, and one on every level.

Q: Why doesn't my smoke alarm sound when I push the test button?
A: It is important that you frequently test your smoke alarms. When you are testing your smoke alarm, there are a number of reasons why the alarm might not sound:
  • You may not be holding the test button down long enough. Try holding it down for up to 10 seconds (20 seconds on photoelectric models) .
  • Your battery may not be installed properly or snapped all the way in place. Even if the alarm sounded briefly when the battery touched the terminals, you still need to make sure it is snapped securely in place. If the battery is loose, in cannot power the smoke alarm properly. After installing new batteries, be sure to test your smoke detector.
  • Your AC power may not be on. AC and AC/DC units will have a power indicator light (red or green) that shines continuously when they are receiving electrical power.
  • If you have a 10-Year model, the smoke alarm may not have been properly activated. If the tab broke away before the alarm was activated, you can use a toothpick to move the switch over to test the alarm.

Q: Why does my smoke alarm go off when I install a battery or turn on the AC power?
A: It is normal for smoke alarms to go off and sound briefly (up to 5-10 seconds) when you install a new battery or when they are powered up. If the alarm continues to go off and no smoke is present, the cause may be one of the following:
  • There may be insufficient battery power, try new batteries.
  • Problems with voltage or insufficient electrical power (brown out) may cause a continuous weak sounding alarm. For AC or AC/DC models, temporarily disconnect power at the service panel until the brown out is over. If you do not restore the AC power, your smoke alarms cannot warn you of a fire.
  • Incompatible warning device. If an incompatible alarm or auxiliary device is linked into a series of AC or AC/DC smoke alarms it may cause the system inadvertently go off.

Q: I lost my First Alert smoke alarm owner's manual. How can I get a new one?
A: First Alert smoke alarm owner's manuals are available online for download at no cost. Find your alarm in our Smoke Alarms section.

Q: Why does the National Fire Protection Association (NFPA) recommend that home smoke alarms be replaced after 10 years?
A: Smoke alarms have a limited life. Although each smoke alarm and all of its parts have passed many stringent tests and are designed to be as reliable as possible, any of these parts could fail over time. Therefore, you must test the devices weekly. The unit should be replaced immediately if it is not operating properly. The performance of smoke alarms older than 10 years is simply not reliable. To ensure your family's safety, all carbon monoxide and smoke/CO combination alarms need to be replaced every 5-7 years. All smoke alarms need to be replaced every 10 years.

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