Nest Protect (Battery) 2nd Generation




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The Nest Protect smoke and carbon monoxide alarm is a "smart" smoke and carbon monoxide alarm. That means it thinks and speaks, alerts your mobile device when something needs to be reported and keeps you in the know so you spend less time worrying when you're away from home.

New for 2015 - the Nest Protect has an industrial grade sensor, can differentiate between slow and fast-burning fires, and its alarm can be silenced from your mobile device. It also runs its own tests, and the carbon monoxide (CO) detector lasts for up to 10 years.

Use it with the Nest app for access to extra features like silencing your alarm when you're not at home, or use it on its own: the new Protect is a functioning, code-compliant smoke and CO alarm even when it is not paired to an account.

A smoke alarm that communicates with you
With the Nest Protect, you receive notifications via your smart device in cases of smoke and carbon monoxide, when batteries are running low or if a sensor isn't working. So there are no unpleasant surprises when you come home after a day - or a vacation - away. And did we mention it's smart? If it detects a full blaze, the Nest Protect flashes red, sounds the alarm and tells you it's time to head for the door. If it's just a bit of smoke, it glows yellow as a precautionary measure.

It identifies and locates the danger for you
The Split-Spectrum Sensor looks for fast and slow-burning fires, and the 10-year carbon monoxide sensor tells you where the poisonous CO is hiding. If you have multiple Nest Protect units throughout your home, you can designate each one a name based on the room it's in, so your alerts will have even more detail when something occurs ("smoke detected in the kitchen", "fire in the bedroom", etc.).

Silence the alarm from the Nest app
We've all done it - pizza in the oven too long, burnt toast - there goes the alarm. No problem. Just use the Nest app to silence the Nest Protect smoke and carbon monoxide alarm from your smart device.

Useful, convenient, and never annoying
The Nest Protect checks itself over 400 times per day to ensure it is working properly and will let you know if something is wrong. The Steam Check feature means a long, hot shower won't cause your alarm to flare up, and as you walk underneath the Nest Protect at night, the Nest Protect smoke and carbon monoxide alarm senses your movement , triggering the white Pathlight to light your way.

Nest Protect helps ensure a restful night's sleep
That low-battery chirp at 2 a.m. is never a pleasant wake up call. Nest Protect smoke and carbon monoxide alarm shows you everything is ok before you go to bed with the Nightly Promise feature. A green glow when you turn out the lights means the batteries are good.

Works with your Nest Thermostat and Nest Cam Wi-Fi video camera
If the alarm goes off, Nest Protect smoke and carbon monoxide alarm tells your Nest Thermostat to turn off the furnace, which is the most common source of carbon monoxide leaks and can spread smoke around the house when there's a fire. Your Nest Cam Wi-Fi video camera will record a clip while the alarm is going off so you can see what happened.

Easy installation
Both the wired and battery versions of Nest Protect smoke and carbon monoxide alarm take only minutes to set up with your iPhone® or iPad® or Android® device. Once they are connected to WiFi, every Nest Protect in your home will automatically connect to the others.

start rating review 4.9 out of 5 stars


3182 Reviews


of reviewers recommend this product.

One in every bedroom

Uncognito - 4 years ago

I have two of the battery smoke alarms in my house and one wired smoke alarm in the hallway. Brilliant piece of hardware. I get a message from the wired smoke alarm when the power is out, all smoke alarms chime together when something is up as well as the phone. Best of all, the smoke alarms check themselves. Best home safety product out there. A+++

Beware of discount sellers

tarooka - 2 days ago

Yes, I'd recommend this product.

My previous Nest's are the hardwired model, this battery Nest is placed in the garage. Installation was very easy. My only issue is wiith Woot. Good price but this item is older stock with a shorter life expectancy. I will buy my next Nest fron Google.

Great product support

we350z - 3 days ago

Yes, I'd recommend this product.

Google replaced an older Nest Protect product for me that I could not get to activate.

Nest Protect

James - 3 days ago

Yes, I'd recommend this product.

Very easy to install. Really like that they don’t need WiFi to communicate with each other. Also appreciate being able to check their status and be alerted of problems remotely with the nest application.

Gives my young child peace of mind

Donald - 5 days ago

Yes, I'd recommend this product.

Does everything it says on the tin, plus my 6 year old who is scared of regular smoke detectors likes looking at the app to see the nest has been testing herself and has plenty of battery and won't be chirping in the middle of the night.

Peace of Mind

Tripp Y - 6 days ago

Yes, I'd recommend this product.

This product makes me feel EXTREMELY safe. A light smokey haze can set it off, which I am completely fine with. The heads up feature is great! And the fact that if you have multiple Nest Protects they can say specifically where the danger is and that is extremely helpful. I Highly HIGHLY recommend this product.