Learn what types of batteries Nest products use

Some Nest products have batteries that need to be replaced every once in a while. This article provides helpful details about the type of batteries your Nest product uses.

Select a product below to learn more.

Nest cameras

Nest cameras connect to plug-in power through a standard household outlet. They don't use batteries.

Nest Connect

Nest connect image.

Nest Connect includes an internal rechargeable battery.

This battery is not user replaceable. It was designed to
constantly charge and discharge as needed throughout the life
of your product.

Nest Hello video doorbell

The Nest Hello video doorbell does not use replaceable batteries.

Nest Protect smoke and CO alarm

There are two different options for Nest Protect: wired or battery powered (how to tell the difference). Both use disposable batteries that will need to be replaced every so often. When your Nest Protect’s batteries start getting low, it will send an alert to the Nest app on your phone. In addition, like traditional smoke and CO alarms, Nest Protect will begin to chirp when the batteries get critically low.

Here are details about the batteries used by your Nest Protect:

  • Nest Protect (battery powered) uses 6 Energizer Ultimate Lithium AA (L91) batteries as its sole power source.

  • Nest Protect (wired) uses 3 Energizer Ultimate Lithium AA (L91) batteries as backup if your household power goes out.

For step by step instructions, visit the following page:

How to replace Nest Protect's batteries >

Nest Secure alarm system

Your Nest Secure alarm system includes three different components.

Nest secure guard front top angle image.

Nest Guard includes an internal rechargeable battery.

This battery is not user replaceable. It was designed to
constantly charge and discharge as needed throughout the life
of your product.

Nest secure detect front angle image.

Each Nest Detect sensor uses one disposable battery that will
need to be replaced when it gets low. The Nest app will notify
you when this happens.

Only replace Detect’s battery with a new Panasonic CR123 or
 Energizer CR123A lithium battery.

How to replace Nest Detect’s battery >

Nest secure tag front angle image.

Your Nest Tag key fob doesn’t use batteries. There’s nothing to replace.

Nest thermostats and temperature sensors

Nest thermostat eco

Thermostat

Your Nest thermostat includes an internal rechargeable battery
that helps it stay powered on. This battery is not user
replaceable
. It was designed to constantly charge and
discharge as needed throughout the life of your thermostat.

Tip: If your thermostat won’t turn on or if its battery won’t stay
charged, it’s usually because it’s not getting enough power from
your household wiring. See our article about troubleshooting
thermostat power issues
.

Nest temperature sensor hero

Temperature sensor

The Nest Temperature Sensor uses one disposable battery that
you’ll need to replace when it gets low. Replace it with 1 CR2 3V
Lithium battery
.

When the sensor’s battery starts getting low, your thermostat
will send a push notification to the Nest app, and another
notification when the battery is critically low.

Nest x Yale Lock

The Nest × Yale Lock uses four standard AA alkaline batteries that will need to be replaced when they get low. Your lock will send an alert to the Nest app on your phone when the lock’s batteries are getting low, and a second alert when they’re critically low.

How to check and change your Nest × Yale Lock's batteries > >

Tip: If you get locked out of your house because the batteries died, there’s a way to temporarily revive your lock using a 9V battery, so you can get into your home and change the batteries. See our article about unlocking the Nest × Yale Lock when the batteries are completely drained.

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