Close-up shot of the back of the Google Nest Protect smoke and carbon monoxide alarm, showing Energizer batteries in the battery compartment, in Lafayette, California, December 6, 2020 Stock Photo - Alamy
Google Nest Protect - Battery, Wi-Fi Smoke & Carbon Monoxide 2nd Gen Alarm (S3000BWEF) - Newegg.com
Google Nest Silver Learning Thermostat + Nest Protect Battery