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Your cart is empty.SC9120LBL 120V AC/DC Smoke and Co alarm - 10Yr Lithium battery - locked battery drawer 120V AC/DC ionization Smoke/Co alarm with a 10Yr Lithium battery back-up. The battery drawer is shipped pre-locked so battery will not be discarded prematurely. Under normal conditions you should not have to replace the battery for the life of the alarm. 10Yr battery backup saves time and money on annual maintenance costs.» 10Yr Lithium battery backup; locked battery drawer; electrochemical carbon monoxide sensor - the most accurate sensor available as compared to other sensing technologies; latching alarm indicator - remembers which unit initiated an alarm; intelligent sensing technology helps reduce the number of nuisance alarms; perfect mount - allows for easy alignment of alarm; single button test/silence; easy installation/maintenance - preferred features include a large opening in the mounting bracket for easy access to wiring. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. A battery pull tab keeps the battery fresh until the home is occupied. Battery installation and removal can occur while the unit is mounted to the ceiling or wall via the side load battery compartment. Two locking features are provided to prevent battery theft and/or theft of the unit. Connection to AC power is made with a "quick-connect" wiring harness. Installation is Quick, easy and cost effective; dust cover; 10-year limited warranty
satx78216
Reviewed in the United States on January 8, 2025
Easy install.
REA
Reviewed in the United States on September 29, 2024
Replaced my old ones, the plug in makes it simple
Anthony
Reviewed in the United States on September 15, 2024
These are the same as what I am replacing eazy to replace.
DMH
Reviewed in the United States on December 17, 2024
My original unit went bad and decided to buy a unit with a 10 yr backup battery which this unit has. Since it's the same basic brand replacement only took about 2-3 min total.
fej735
Reviewed in the United States on November 15, 2024
These were easy to install and seem to work well
Mary Connell Bettano
Reviewed in the United States on April 16, 2020
We very much appreciated the ease around this purchase during the Covid-19 Crisis; Our fire alarm system went off, Firemen to the house and they recommended this longer life replacement. Had same brand installed 7 yrs ago and they worked through there expected life. Thank You
1790
Reviewed in the United States on September 1, 2019
Combined smoke and CO alarm, with a battery that lasts 10 years. Easy to replace my existing BRK First Alert hardwired 9120 alarms. Battery was included. Due to the CO sensor life limitations, I plan to replace these in 7 years. If I were not replacing existing First Alert detectors, I would have bought the Kidde ones that speak to describe the emergency. Hopefully by the time these need to be replaced, there will be a hardwired interconnected option with smoke, CO, speaking, and a 10-year battery that fits my existing wiring harness, or by then maybe I will be ready to wire a different harness and mounting ring. Shipment was as promised.
mariolina
Reviewed in the United States on February 23, 2017
BackgroundI bought this to replace a similar-looking BRK First Alert CO-only detector in my basement that had reached its end of life after 7 years. I chose this model because my local building code requires a hard-wired detector with battery backup near my gas-powered boiler, and I wanted one with the longest possible lifespan, which is apparently 10 years. I would have been happy with another CO-only detector because I have a separate smoke detector in my basement at the foot of the stairs, but I couldn't find a hardwired CO-only detector with a 10-year battery backup. Having two smoke detectors a few feet apart in my small unfinished basement is overkill, but I'm required to have a smoke detector at the foot of the stairs, and to have a CO detector within a certain distance of my boiler. If the team that installed my new boiler had thought about it, or consulted me about where to install the CO detector, I could have made do with a single combined detector, but now I'd have to rewire to change its location of the CO detector. (The smoke detector is battery-powered.)ReviewInstallation wasn't too difficult. The only difficult part was figuring out which circuit my original hard-wired CO detector was on. Because my previous CO detector was the same brand, I was able to plug the original plastic connector into the receptacle on this detector, rather than having to actually connect the wires, which saved a step. (Installation would have been more involved if I had wanted to use the interconnectivity feature of this detector.) However, even though the shape, size, and screw-in base of this detector looked identical to those of my original CO-only detector, I was disappointed to discover that the new combined detector didn't fit the base of my original CO detector as you might expect. I had to remove the original base and install the one that came with this detector. You would think that First Alert would have standardized this part to save on costs and inventory, not to mention to make it easier for customers to upgrade from the CO-only detector to the combined detector.This is a good, no-frills, combined CO and smoke detector that meets my local building code. It's not very attractive (not an issue for me because I installed it in an unfinished basement), and it has no bells and no whistles, just an obnoxious alarm and an irritating end-of-life warning beep pattern that you won't be able to silence until you could replace the unit (per design). It could be better, though. For example, the green LED that indicates that the device is receiving power is inside the cover, so it's not as visible as it might be, and it would be nice to have an LED readout of the CO level, if detected.So far, so good. If the battery fails before 10 years, I'll be sure to update this review.
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