Kidde Smoke Detector, Hardwired with 10-Year Battery Backup, Interconnectable, LED Status Lights, 85 dB Alarm, 5-inches, 20SA10, 1 Pack

I haven’t had these for long, but I’m impressed so far. I replaced five of my smoke and smoke/CO detectors because my 6-year-old Firex units kept chirping for no reason, even with fresh batteries. I decided to stop messing with them and swap them all out for these. Installation was straightforward—I rewired them with the new harness since the plug was different and got them all mounted. When I turned the power on, they all started beeping. Walking around, I noticed the power light was off on all but one unit. Only one had the green light on. I powered down, checked the wiring, and found the white wire had slipped out of the screw cap on the working unit. After fixing it and powering back up, everything worked perfectly. I like that it alerted me to a wiring issue. The wire must have popped out when I pushed the cap back into the box. All good and secure now. My favorite feature is the 10-year built-in battery, especially since I travel often and lose AC power regularly. Not having to change batteries is a huge plus. These are solid units—well-designed, easy to install, and smart enough to detect when something’s wrong. Five stars. UPDATE 11/25: After a year of use with NO false alarms and no chirping at 2:00am, going away for months at a time, these have worked out great for me. Worth the upgrade!

Excellent brand smoke detector. Used it to replace one in a bedroom that had reached its ten year operating period and was not responding to the reset function. This was a hard wired detector but the installation was simple given the instructions and tools provided. It too should give us ten years of safety and service.

DO NOT RECOMMEND!!! I purchased this smoke detector because I have Kidde smoke detectors throughout my house and have since 2013. This appears to be the newest model and is not compatible with the older model of Kidde smoke detectors I purchased last year. Here are the issues that I had installing this smoke detector: 1. This smoke detector does not fit into the base of the older model Kidde smoke detectors. I had to change out the base in the ceiling. Normally not a big deal except the new base does not have a hole for the hardwires to fit through. I had to drill a hole into the new base to hardwire the smoke detector. 2. When attaching the new base to the ceiling, the screw holes are off from the standard junction box size and did not fit properly, had to make a new hole for those as well. Also, you cannot install this base unless you take the screws completely out of the junction box. There is no larger hole that the head of the screw can pass through with a slot to turn and lock the base in place. The old base had that, the new base for this model has a hole on one side that fits the screw and a small slot on the other side that still only fits just the screw. 3. The plug style for the hardwire is not the same either. This will require you to rewire the new hardwire plug rather than using the old Kidde plug from the previous Kidde smoke detector. 4. Once the base is modified and installed into the ceiling and the new hardwire plug is wired, the smoke detector will not fit onto the base if the hardwire plug is actually plugged into the smoke detector!!!! There is a release tab on the new plug that prevents the smoke detector from being installed onto the new base that came with the unit. I had to cut the tab off the plug that came with the unit to allow the smoke detector to be installed onto the base that came with the unit. Summary: Nothing in this smoke detector is compatible with any previous Kidde smoke detectors. In fact, NOTHING that came with this smoke detector (the base or the hardwiring plug) is compatible with anything else that also came with this smoke detector!! The base and wiring plug took a lot of modification to actually install this unit. I will NOT be purchasing a Kidde smoke detector ever again!

This is a good product and easy to install and replaced a previous Kidde product that required replaceable 9V batteries. i bought 2. one was fine but the second one clearly was a return as not only was the battery already activated but it also would not hold a charge and manufacture date was Nov 2024 but item bought in March 2026. Amazon need to check returns for whether item was already activated before returning. Unfortnuately i was past the date for return to amazon when i installed and instead reached out to customer support at Kidde who were wonderful and promptly replaced it.

This is a reasonable, though not perfect, replacement for the previous dual-sensor detector. So far, no major issues except for one false alarm shortly after installation.

They replaced my old smoke detector, that were wired and connectivity. I only had to change the base and purchase new wiring harness. They were easy to install, the indicator lights are very visible and a good price.

There are a variety of time line life expectancy for all smoke detectors. Be aware the less expensive ones have shorter lifespans. I like not having to deal with battery changes annually so it is worth it to me to spend a bit more and get the longer lifespan units with built in batteries. That being said all the included hardware makes it simple to swap out. However you may need to verify the preexisting wires first before installing the supplied pigtail connector. Homebuilders use variety of wire color but black and white are the most consistently used the third wire could be any color and that is the one that is used for connection in a series. Read all the instructions first it is well worth your time and you can save your self fro a headache.

I replaced my old Kidde smoke alarm because it was ten years old, and although still working, Kidde recommends to replace after ten years. This one is wired and has a ten year lithium battery life. It is top rated by CR. Although it didn’t look difficult to connect, if you are already wired, I had a handyman install it. When we tested it, it was loud! It is slightly smaller than my old Kidde alarm from ten years ago, but still covered the hole. Great value as I am safe!