How do I replace the batteries in the e7w thermostat?

The e7w thermostat uses four AA alkaline batteries. Insert the batteries into the battery compartment, matching the '+' terminals on the batteries to the '+' symbols in the compartment. Only use alkaline batteries; using an incorrect battery type risks explosion. When the low battery alarm is displayed, replace the batteries immediately. Dispose of used batteries according to the WEEE Directive 2012/19/EC.