How Do you change batteries in a Honeywell Thermostat T8411R 1002 (2)?

To change the batteries in a Honeywell Thermostat T8411R 1002, first, remove the thermostat from its wall mount by gently pulling it off. Next, locate the battery compartment on the back of the unit and slide it open. Replace the old batteries with new AA alkaline batteries, ensuring the correct polarity, then close the compartment and reattach the thermostat to the wall mount. Finally, check that the thermostat powers on and functions properly.