How To Change Nest Thermostat Battery. The nest thermostat battery is charged directly from your hvac system via the rh and/or rc wires. Nest thermostats internal battery can be recharged via the usb port located on the back of the units.
The battery of a honeywell thermostat needs to be changed once a year and you will start getting notification for battery replacement 60 days before the battery lasts. Do not use rechargeable or alkaline batteries. Change your wall thermostat batteries once a year, or when the low battery indicator appears on the digital display.
Therefore, you get enough time to change the batteries, but is there a catch to this!
Step 5 lift battery from the base. Therefore, you get enough time to change the batteries, but is there a catch to this! The built in batteries for the nest thermostat isn't user replaceable. Your nest thermostat uses the voltage from your system’s wires to keep its internal battery charged.