Kidde Smoke Detector, Hardwired & 10-Year Battery Backup, 20SA10, 2 Pack

These smoke detectors work exactly as expected and integrate well into a hardwired system. The installation process was straightforward, and the interconnect feature adds an extra level of safety by ensuring all units alarm together. The LED indicators are clear and make it easy to confirm normal operation at a glance. The standout feature is the 10 year backup battery. Not having to replace batteries or worry about chirping alarms for a decade is a major advantage and reduces ongoing maintenance. For anyone upgrading or replacing hardwired smoke detectors, this two pack offers dependable performance and long term convenience at a reasonable cost.

I just found out that smoke detectors must be changed every 10 years. My old Kidde hardwired smoke detectors have been working perfectly for 15 years, no false chirps or beeps. I do change the 9V battery every year which really helps. But even with maintenance, the parts can fail and render the smoke detectors inoperable and inaccurate. Your insurance company might also refuse or reduce your payout in the event of a fire if you have old detectors. My search for replacements was pretty easy since Kidde is well known and well respected, and I've had no issues with them for the past 15 years. I purchased the hardwired interconnectable version with the 10-year battery backup. The thought of not having to change the 9V batteries each year and not climb up and down ladders was a huge motivator. The entire process of taking down the old smoke detector pictured on the right and putting up the new one on the left took a few minutes for each unit. Even though it's essentially the same company and detector, they did change the plug and mounting bracket. Although the mounting bracket looks the same, the new one is much thinner, and the new smoke detector will not fit on the old mounting bracket. To make it even easier, I also purchased the Kidde adapter so I didn't need to rewire any of the units with the new plug. So I took down the old unit, took down the old mounting bracket by loosening two screws, installed the new mounting bracket, and installed the new smoke detector with the new plug adapter. Again, about 2 minutes for each unit. I did read the instructions and did follow them. The one note to save you time and trouble is to make sure you activate the battery BEFORE you plug the unit into the wiring harness. You will hear a beep when you activate the battery either by mounting it to the bracket, which I did before I installed the bracket on the ceiling, or with a screw driver prior to mounting it to the bracket. After you hear the beep, then plug it in and mount it to the bracket. If you're looking for an easy replacement for your hardwired, interconnectable smoke detectors that require no maintenance for 10 years, this is the one!

I researched, purchased, and installed. I want the best for my family and didn't want to deal with those pesky low battery alarms that plagued our last set of smoke detectors. Everything installed great, and I almost forgot about them (seen and not heard sort of thing--as it should be) until last month. While the kids were at school, the detector in my son's room alarmed, setting-off the whole house (while my wife is working from home). Nothing seems to have caused it. I reset it. Two days later, it happened again during the day while I was there. No amount of beeps and lights and internet searching could tell me what was wrong. I called customer service, because one of my kids is on the spectrum and sometimes has sleep issues. Customer service says that it could be dust or a tiny spider and to use compressed air to blow it out. Done. Hopefully, the problem is solved. Nope. A week later the living room detector alarmed. Thankfully during the day. Fast forward to about 10 days ago. Some time after midnight, every detector in the house is alarming due to the garage detector going off. With chest pains from being violently awakened in the night, I removed the garage detector, blew it out with the air compressor, reset it, and left it disconnected on the freezer for tomorrow. Thinking that some dust from shipping must be on all of them, I resigned myself to cleaning them all tomorrow. After some breathing exercises to help flush the adrenaline out my system, I was able to go back to sleep. I thank God that my son seemed to sleep through it. Unfortunately, it happened again about five nights later at about 1am. Same adrenaline rush, same chest pains. I'm writing now because it just happened again around 7pm this evening with the detector in my son's room. Third time with this one, sixth time across three different detectors overall. I was just considering replacing the garage detector with an ion type (these are photo-electric, I think), but now I'm not so sure. I spent over $200 on these for their high rating and ten-year sealed battery, but the low-battery chirp a few times over ten years is starting to look mighty attractive rather than regular, random nuisance alarms.

I installed this smoke detector with ease as everything came provided in the box. I simply removed the previous template on the ceiling and then installed the one that came with this set. Wiring was easy as it was already color coded (red, black, white). The lifespan lasts 10 years with the built-in lithium battery. Sound level was pretty loud during the test I performed. The size of the smoke detector is typical 6" diameter you find with this and other brands. I have not tested it with actual smoke but one day I'll update this review of it happens.

Fit perfect and easy install. The lights on bottom are much brights than my last ones at night.

These nightlights are incredible! Extremely bright green light that lights up the bedrooms and hallways wherever installed in my house. Also, they double as an alarm! The alarm sound is quite loud and effective - I just need to figure out how to set it to go off at 6:00 am when I get up because it is LOUD and would make me get out of bed. Interestingly, the package claims these circular nightlights can detect smoke. I haven't tested that feature yet and kind of hope I never have to. But really effective nightlight feature if that is what you want and need in your house. ---- All sarcasm aside, installation of these smoke detectors was quite easy. I was going from a previous Kidde smoke detector that I didn't love (2 of 7 had failed under warranty - a couple others chewed through the back-up AA batteries - and when one failed or hit "low battery" status, 4 out of 5 times it would happen at 2:00 am). But I didn't want to take the time to rewire for a different brand, so I went with these and the Quick Connect adapter (https://www.amazon.com/Kidde-Compatible-Hardwired-Combination-Detectors/dp/B0D5TD3GJF/141-2024226-8611610) and my seven 10-year-old detectors were replaced in about 20 minutes. So far, none have failed, which is a better track record than the previous models we had. But I am not kidding when I say that the green light on the front is extremely bright. My wife and I like our bedroom dark, and this thing is truly like a nightlight that illuminates the entire room with a gentle green glow. After giving ourselves several nights to try to get used to it, we finally put a small piece of tape over the light to dim it - and it STILL can shine through the tape! But if these things don't fail as often as the previous generation, I'll let these remain a 4-star product. If they could dim the green light, I'd bump it up to 5. So other than the annoying light, these detectors seem to be good.

I recently bought two 4packs (8 alarms total) and replaced every single alarm in my house. My previous alarms were older generation Kidde's so I thought they would be plug and play. I was wrong and I did not know they sold the adapters so I had to rewire every single alarm. The first few weeks of having them, there were a few false alarms. Turns out that the hardwiring on these is very sensitive and if they have a weak connection, it makes them act crazy. Each time a false alarm happened, I would identify which alarm triggered it (blinking red light) and I would go through and realign/tighten the wiring. After about three times. We seemed to get past the issue and they have been trouble free since. Side note - the green stanby light on these is quite bright and can be potenitally bothersome in bedrooms to certain people at night time

Cannot recommend. Thought these would alleviate some of the hassle of having to change batteries over the course of 10 years and they've caused more issues than they've solved. I bought four of these and two of the smoke + carbon monoxide. The two combo devices have miraculously been fine so far, but all four of the smoke detectors have failed and had to be replaced within the first six months. Kidde Customer service was somewhat helpful to start, but seemed to get increasingly annoyed and inconvenienced by my request for replacement units as each one failed. If you don't follow all the warranty troubleshooting tips precisely (mostly blowing out the unit with compressed air), they will give you a hard time about the issue being your fault. I honestly couldn't recall what steps I had tried or not and did not expect to call customer service for every, single unit so didn't document every step along the way while trying to silence these things at 2AM to not further disrupt our sleeping family and agitated dogs. After all four units failed and were replaced one-by-one, it seems that they're cycling through failing again and I'm ready to swap out all units for AA backup units again as there is clearly a design flaw with the 10-year battery version. Hopefully this saves at least someone else from buying this horrible product and having multiple nights of bad sleep and an alarmed toddler who is now terrified of the smoke detectors in our house. I'd be open to trying the AA battery version but would not trust the 10-year battery as none of the units made it more than a few months before behaving faulty.