There are several Nest products. I didn't replace the batteries in the 4 years I was using it.
Google Nest Learning Thermostat 3rd Generation, Stainless Steel - Smart Thermostat - A Brighter Way To Save Energy
Google Nest Learning Thermostat 3rd Generation, Black - Smart Thermostat - A Brighter Way To Save Energy, Black
Google Nest Learning Thermostat 3rd Generation Smart Thermostat Black New Sealed
Google Nest Learning Thermostat (3rd Gen) Smart Thermostat - Stainless Steel
Google Nest Learning Thermostat 3rd Generation, Black - Smart Thermostat - A Bri
Google Nest Learning Thermostat 3rd Generation Smart Thermostat Copper T3031EX
