When Google Nest Detect’s battery starts getting low, the Nest app will let you know. In addition, Google Nest Guard’s Info button will light up and the next time you arm your system it will make an announcement. You can also manually check for a low battery any time with the Nest app, or on Nest Detect itself.
We designed Nest Detect so that you can get up to two years of use before the battery needs to be changed. Underwriters Laboratories (UL) recommends you check the batteries in your Nest Detects at least once a year. Here are the different ways you can do that.
Automatic low battery notifications
Your system constantly monitors the batteries in your Nest Detects, and it will let you know ahead of time if you need to replace any of them.
On your phone or tablet
Even if you’re away from home, you can use the Nest app to check for a low battery.
As soon as Nest Detect senses its battery is getting low, Google Nest Secure will send a notification to your phone or tablet. When the battery gets very low, Nest Secure will send another notification.
On Nest Guard
If Nest Guard senses anything that needs attention, the Info button will glow yellow. A low battery in Nest Detect can cause this, but so can other things. Press the button to hear an announcement about what the issue is and where it’s occurring.
How to manually check batteries
On Nest Detect
You can also press Nest Detect’s button to see whether it has a low battery.
The color of the light will tell you whether the battery is low:
With the Nest app
What happens when the battery gets low
Even with a low battery, Nest Detect won’t stop looking for activity. It will continue to monitor activity the same way it does when the battery is full.
However, if you have the Pathlight feature enabled for Nest Detect, it will automatically disable itself when the battery starts getting low. This helps conserve power. After you replace the battery, the Pathlight feature will automatically turn itself back on again.
If the battery drains completely, Nest Detect won’t be able to sense activity or do anything else until it gets a new battery. In addition, if the battery dies while your system is set to Home and Guarding or Away and Guarding , the alarm will sound. So it’s important to replace the battery as soon you learn it’s getting low.
To replace the battery, follow the steps at this link: