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I don’t know how long the batteries last but they are replaceable.
Sorry, there was a problem. Please try again later.Google Nest Detect’s battery can last up to two years. When the Nest app tells you the battery's getting low, it’s important to replace it promptly with a Panasonic CR123 or Energizer CR123A lithium battery. You can click this link to know how to check if Nest Detect’s battery is low: https://support.google.com/googlenest/answer/9218610?hl=en and this link to know how to replace Nest Detect’s battery : https://support.google.com/googlenest/answer/9227538?hl=en
Sorry, there was a problem. Please try again later.I’ve had mine over a year so haven’t had to but I hear that they can be replaced.
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