Thermostat doesn’t have enough power for Wi-Fi message after 3 years of use. What to do?

[JFXFJR]

After 3 years or so of use, almost 4 years, one of my many Google Nest Learning Thermostats is suddenly showing the message "Thermostat doesn’t have enough power for Wi-Fi".  My guess is that the lithium ion battery is no longer charging sufficiently.  If the battery is toast, do I need to replace the battery?  Or the thermostat?

Thank you.

[SoriaD_]

Hello JFXFJR,

Thanks for reaching out to the community. I'm so happy to help you with your thermostat situation.

Let me inform you that this thermostat model has a non-replaceable battery. Unfortunately, the entire thermostat will need to be replaced.

Tell us if you need assistance; we are happy to help you. 

Best regards,

Douglas.