Nest learning thermostat 3rd generation battery replacement

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Nest cameras
Nest doorbells
Nest thermostats and temperature sensors
Nest Protect CO and smoke alarm
Nest Connect
Nest Secure alarm system
Nest × Yale Lock
Does Nest 3rd Gen have a battery?
How long does Nest 3rd generation battery last?
How do I charge my Nest 3rd generation?

I had this problem two-years into my NEST Gen3. I could use external USB to charge it, but it wouldn't hold the charge when mounted on the wall. Turns out that my 20-year old small 24 volt transformer was in the process of failing, and only put out about 17 volts. Strangely enough, the furnace kept operating, but the NEST battery wouldn't charge. I replaced the 24v transformer in the basement and all has been well.

That said, my NEST will be 5 years old soon, so your post has me wondering if I'm going to need a battery replacement.

There really is no solution - my 3+ year old battery occasionally fails to hold a charge (or get fully charged) and there is no viable replacement, so my only solution is to manually charge the Nest when it happens or buy a new one. Fortunately 30-45 minutes on the charger is enough to get things behaving, but it's not a very good solution, nor is not having a decent replacement battery good customer service. I realize at least part of the problem is the way my thermostat/furnace wiring is set up - I have no C wire, resulting in my battery only charges when heating or cooling is happening, but it's clear that the battery is not what it once was.

380mAh TL284443 Battery Replacement Compatible with Nest Learning Thermostat (3rd Generation) A0013, T3007ES, T3008US. * Replacement for the Following
Battery Model/Part Numbers: TL284443. * Intended for/Compatible with the Following
Thermostat Models: Nest Learning Thermostat (Gen 3), A0013, T3007ES, T3008US, T3016US, T3017US, T3018US, T3019US, T3021US, T3032US. * 3.7V 380mAh 1.41W h Lithium-Polymer Rechargeable Battery Pack. * Includes Free Installation Tools. * 1 Year Replacement Warranty. MPF Products® is a Registered Trademark.

Item # IF362-000-1

$17.99

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Batteries may only be shipped within the contiguous USA at this time and may only ship via standard shipping.

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One year warranty

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Some Google 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 Cam (battery) has an internal rechargeable battery so that it can stay powered without being plugged in and can have backup power when the electricity goes out.

When its battery is low, you’ll need to recharge it. If needed, you can also troubleshoot power issues for the Nest Cam (battery).

All other Nest cameras connect to plug-in power through a standard household outlet and don’t use batteries.

Nest doorbells

Nest Doorbell (battery) has an internal rechargeable battery so that it can work without being wired to a doorbell system. You can also choose to connect it to your current doorbell’s wires. In this case, it will use the wires to charge the battery, and have backup power if the electricity goes out.

When its battery is low, you’ll need to recharge it. If needed, you can also troubleshoot power issues for the Nest Doorbell (battery).

While Nest Doorbell (wired, 1st gen and 2nd gen) has a small internal battery that assists with sounding the chime, it cannot keep your doorbell powered on its own. Because it connects to your doorbell system’s wires for power, it will not have backup power if there’s a power outage.

System compatibility with Nest doorbell

Nest thermostats and temperature sensors

Note: Go to How to tell which Nest thermostat you have if you’re not sure which Nest thermostat you have.

Nest Thermostat

The Nest Thermostat uses 2 standard 1.5 V AAA alkaline batteriesthat you’ll need to replace when they get low.

When the batteries start to get low, you’ll get notification on the thermostat and in the Home app. You can check the battery power level on the thermostat or in the Home app.

Nest Thermostat E and Nest Learning 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.

Temperature sensor

The Nest Temperature Sensor uses one disposable battery that you’ll need to replace when it gets low.

Replace it with1 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 Protect CO and smoke 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.

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.

Replace Nest Protect’s batteries

Nest Connect

The 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 Secure alarm system

Your Nest Secure alarm system includes three different components.

TheNest 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.

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.

Replace Nest Detect’s battery

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

Nest × 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 in the Nest app on your phone when the lock’s batteries are getting low, and a second alert when they’re critically low.

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.

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Does Nest 3rd Gen have a battery?

The Nest Thermostat receives power from your HVAC system. It also uses 2 AAA alkaline batteries as a backup, or to supplement if your system can't deliver enough power.

How long does Nest 3rd generation battery last?

the batteries in a Nest thermostat are just standard AAA batteries, but because they are only being used as the back up power for the system, they should last a fairly long time, about 12-24 months.

How do I charge my Nest 3rd generation?

You can use the USB port on the back of your Nest Learning Thermostat or Nest Thermostat E to charge it up when the battery is low. Pull off the thermostat display. Plug it into a USB port on your computer or a wall charger like the one you use to charge your phone.