




The First Alert SMI110 10-Year Sealed Battery Smoke Alarm provides reliable protection and meets new industry standards. First Alert’s Precision Detection advanced sensing technology helps reduce cooking nuisance alarms and provide an early warning. The 10-year sealed battery makes installation of the alarm easy and no battery replacements are needed for the life of the alarm.
First Alert’s Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.
10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
End-of-life warning lets you know when it’s time to replace the alarm
Test/silence button for efficient testing to ensure alarm is working properly
8 reviews for First Alert Smoke Alarm, 10-Year Sealed Battery Detector with Test & Silence Button, SMI110, 1-Pack
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$24.99

Ryan Allan! –
High-Quality Fire Safety on a Budget
In the realm of home safety, the First Alert 0827B Ionization Smoke Alarm firmly cements itself as an indispensable asset. It’s a top-tier product that pairs affordability with outstanding performance, ultimately creating an environment of safety and security in my home. As such, it fully earns its five-star rating.Right from the outset, the sensitivity of the First Alert 0827B to fast-flaming fires, thanks to its advanced ionization technology, provided me with a significant comfort level. The reassurance that this smoke alarm will promptly alert me at the earliest indication of smoke, allowing for sufficient time to respond and evacuate, is invaluable.The installation process was refreshingly straightforward. The device is designed for easy mounting on any wall or ceiling, which means it can be optimally placed to provide the most efficient smoke detection. As a homeowner, this user-friendly setup was greatly appreciated and added to the overall positive experience.Equally beneficial is the test/silence button incorporated into the unit. This feature allows for regular operation checks, ensuring the alarm is always in perfect working order. The ability to silence any potential false alarms swiftly is an additional advantage, minimizing any unnecessary panic or disturbance.What sets the First Alert 0827B apart is its price point. Despite being extremely budget-friendly, it delivers exceptional functionality and reliability. It is truly commendable to find such an efficient, potentially life-saving device that is also affordable, ensuring all homeowners can benefit from this vital safety measure.To conclude, the First Alert 0827B Ionization Smoke Alarm is a superior safety product that expertly combines cost-effectiveness with reliable performance. It delivers a reassuring sense of security and peace of mind, which is ultimately priceless. If you’re in the market for a smoke alarm that provides excellent value without compromising safety, this device is the perfect choice.
Kindle Customer –
Top quality brand detector
Bought hard wired detectors that were easy to install. Has a door/place for 9V backup battery.
Amazon Customer –
Smoke alarm with 10 year warranty.
When I received the smoke alarm, I first thought it was defective. It was a sealed unit with a 10 year warranty on it. When I pressed the test button, it did not work. I called the number to troubleshoot it & was told the unit will only work when it is installed on the bracket that holds it. Sounded strange but I tried it. It does work. Happy with the new smoke alarm that it has a 10 year warranty.
A Marshall –
Easy Installation – Fits Older Model First Alert Bracket
This model SM110 alarm was easy to install and activate, using a previously installed mounting bracket for an earlier First Alert model A710. This is important for me, because I am an older adult (age 70+) and not keen on standing on a stepladder with a drill or screwdriver.My old smoke alarm was installed by a contractor 12 years ago, so its mounting bracket was properly and firmly attached, but the alarm was also past its end of life. This time around, I wanted an alarm with a sealed, 10-year battery.Although the SM110 is shaped somewhat differently, the base turned out to be the same circumference as the earlier model. This model was easy to fit into the older bracket, and to activate by pulling the yellow tab. However, due to the location of the locking tabs along the side of the base, the orientation of the alarm is slightly different. My alarm was mounted on the wall over my bedroom door. The new alarm fits, but is not quite vertically oriented.This doesn’t affect the function of the alarm. It shouldn’t, since these alarms can also be mounted on the ceiling, so other than aesthetics, the orientation of the alarm when mounted shouldn’t matter. In any case, I tested and the alarm definitely is working.Note: I recommend wearing earplugs when testing — the alarm is very loud and piercing! Quite unpleasant, but I’m a sound sleeper, so in case of fire loud is good.Also, there’s a little embedded green LED light to show that the alarm is active, but it is almost impossible to see.
Debbie –
Great product
Great alarm, just remove tab and ready to install
Shelley P –
Installed fine, seem to work, and flashing lite isn’t a disturbance
They installed without an issue. Tested fine once installed.They do have a flashing light that goes off every minute to let you know they’re working, and I was concerned about them being in the bedrooms. But the light is subtle enough that you really don’t see it and it isn’t disturbing.Without the house catching on fire, don’t for sure if they’ll work. Assuming they will.
Brian & Carly Loch –
Doesn’t last even 2 years – wouldn’t recommend
I hardly ever write a bad review, but I need to on this. This says it lasts for 10yrs, but it’s not even close!!Date of manufacture: June 29, 2023We bought it: Nov 2023Today’s date: June 16, 2025Today it malfunctioned or the battery is dying. Not sure which.Whole story: When we bought it we installed it in our temp controlled basement (never gets freezing/overheated). Today when I got home with my small children it was doing the 3 beeps. Not the 3 beeps every 40sec as if the battery were low, 3 beeps constantly, like there’s smoke (but there isn’t any smoke and none of our other smoke alarms (which are a diff kind) are going off). It does the 3 beeps for a range of time, 5-15 min and then turns off on its own if I don’t press the silence button. Then it restarts beeping a bit later. I’ve tried pressing the silence button and I’ve tried taking it to another room in the house, it still restarts beeping. Sometimes it’s silent for several seconds or several minutes before restarting, and there was one time it turned off for almost an hour before restarting. This detector hasn’t even lasted 2 years. Don’t buy this.
dhara –
Why is it not working? I’m literally holding smoke near it. The test alarm indicates it’s working but it’s not reacting to such intense smoke.