Article Summary:
After setup, it is possible Nest Protect will chirp or notify you in the app that the batteries are low. If this happens, it just means that the batteries’ voltage temporarily dropped during the setup process. It should return to normal after a few hours of rest.

Wi-Fi communication uses a lot of power. So if it takes longer than expected to connect your new Nest Protect to your Wi-Fi network and add it to your Nest Account, its batteries will have to use a lot of power. But after a short period of rest, their levels will come back up. This happens with lots of types of batteries. For instance, if you repeatedly try to start your car but the engine doesn't turn on after a few tries, you may need to wait for a little while to give your car battery a chance to recover power.

I only received a low-battery message in the Nest app (and heard no chirp from Nest Protect)

If you get a message in your app right after you've added your Nest Protect to your Nest Account, but you don't hear a chirp, you can just mount it and wait a day or two and see if the issue resolves itself.

I heard a low-battery chirp from Nest Protect

If your Nest Protect chirps right after you've added it to your Nest Account, follow these steps to get its batteries back up to a full charge:

1. Take the batteries out for about four hours.

Learn more about removing the batteries >

2. Once you put them back in, connect your Nest Protect to the Internet by pressing the Nest button.
3. Check Battery in the Nest app. It should have a green checkmark next to it, indicating that the battery charge is back to normal.

How do I check the level of my Nest Protect battery? >

If you need to replace the batteries in your Nest Protect with fresh new batteries:

• Only use Energizer Ultimate Lithium AA (L91) lithium-iron batteries.
• Make sure you do not use alkaline batteries.

What type of batteries should I use with Nest Protect and where do I get them? >

Note: If you don't see a blue light or hear the welcome message after removing the Nest Protect battery tab, it may seem like the batteries are dead. However, it's more likely they have come loose in shipping and only need to be pushed back in. Check out the article below to learn more about fixing this issue.

Nothing happens after I remove the battery tab from Nest Protect >