Does the Ecobee have a battery?
Similarly, it is asked, how do I change the battery in my ecobee?
Changing the Battery Replacing a Room Sensor battery involves gently prying off the battery cover, popping the battery out, and replacing it with a fresh CR-2032 coin-cell battery, inserted positive side up. ecobee Room Sensors use 3-volt CR-2032 batteries that can be purchased here.
Besides, how long do ecobee sensor batteries last?
The battery is a type for the old ecobee Room sensors is CR2032 (the little silver coin shaped batteries). It will run the sensor for 18-24 months. However, the new Smart Sensors use a CR2477 which should last for 5 years.
There's one caveat: The Ecobee3 Lite doesn't offer a rechargeable battery like Nest, so you'll need to have a C wire to power the digital display or install the included Power Extender Kit. Shut off power to your thermostat at the circuit breaker.