Nest thermostat says it has a low battery and won't connect to wifi anymore. Checked the technical info and from what I've read, all numerical values check out that it should be
How To Fix Nest Thermostat Low Battery - How To Digital Stuff
Nest Thermostat Battery — OneHourSmartHome.com
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Google Nest Learning Smart Thermostat with WiFi Compatibility (3rd Generation) - Copper in the Smart Thermostats department at Lowes.com
How Long Does Nest Thermostat Battery Last Without Power? (Solved)