BRK SM210, 10-Year Sealed Battery Smoke Alarm with Slim Profile Design, 1-Pack

Easy to install. Wish it was cheaper but hey they last 10 years . I was replacing out my old ones that started to make noise. I guess they had low battery. However, I don’t want to say it did not last 10 years they lasted. Only seven years was still a good price. Additionally, these ones are about like half an inch wider than my old ones. So happy that they went to all white and not that off-white ugly color.

Horrible product. I will no longer purchase First Alert products. I've now had 2 of these fail. One within the first year, and one within 18 mos. This is unacceptable for a product that is meant to last for 10 years. The smoke detector begins to beep as if there is a fire event. When you call customer service, they ask you to clean the detector and try it again. I followed directions and the next day, the same thing happened. They offered to send me a replacement, which I still have never received. In the meantime, I bought another of the same product so I wouldn't have to drill more holes in my ceiling and the next one failed in the same way.

Easy to install. I like these because there is no more replacing batteries twice a year. I replaced the ones that I bought 5 years ago that were only a 5 year battery, so this 10 year battery is even better. Nice slim profile. It has a spot to write installation date so you know when to expect to replace it. I have set it off cooking, while browning meat. It is very loud, which is good. It would wake you up if you were asleep and a fire started. Once I opened the door and windows, the smoke cleared, and the alarm stopped.

Easy to install. Great value. Continue to buy same product. Sometimes they only last 5-8years. Still better than other brands.

This is the 3rd one of these units I have had with the "10 year" sealed battery and none of them have made it even a full year. They also claim "no low battery chirps" but when they start to die, they just go off with 3 sets of 3 full blast alarms (same as an actual fire alarm) every hour. Without fail, this always happens in the middle of the night, and the only way to disable the low battery alarm is to permanently deactivate the unit with a screwdriver by snapping a plastic tab which is loads of fun to do when you are half asleep in the dark on a ladder and your adrenaline is pumping full blast because you thought the house was on fire. And one other major annoyance, is that with every revision of this product, (even with the same model number) the 3 units I have purchased all had different mounting bracket screw patterns, so you can't even re-use the same mounting ring if you decide to get a replacement. The other alarms I have in the house are the older models with replaceable batteries and they usually go a couple of years before the batteries need swapped out. I won't be purchasing any more of these models.