How to change Nest Thermostat batteries (Low battery message)

Important: This article only applies to the Nest Thermostat. Learn how to tell which thermostat you have.

Nest Thermostat 3/4ths view


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.

You can’t replace the batteries for the Nest Thermostat E or Nest Learning Thermostat. Instead, charge the thermostat with a USB cable.

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