How To Change Nest Thermostat Battery. Hi there, the nest learning thermostat has a rechargeable lithium ion battery, and it should last for several years. Change your wall thermostat batteries once a year, or when the low battery indicator appears on the digital display.
However, there a few common issues that can cause the battery to get low and then it requires you to charge the nest thermostat. For the most people they work great without any issues. Pull the thermostat display off the base.
Try reinstalling your old thermostat.
A typical reading for a nest battery voltage when working properly is over 3.6v which is the bare minimum for the nest thermostat to operate. The nest thermostat works with 95 percent of homes. Insert the two new aaa alkaline batteries. However, there a few common issues that can cause the battery to get low and then it requires you to charge the nest thermostat.