Abner Li, writing for 9 to 5 Google:
Nest owners have reported that their smart thermostats have stopped working and as a result many woke up to colder than normal temperature in their house and unresponsive completely dead Nests. The fault lies in a software update (version 5.1.3 or later) that was pushed out to devices in December that drains the battery and ultimately shuts down the device.
Yikes. Upstate New York’s been a bit cold lately — I would not want to wake up without any heat.