How do you change the battery in an instant ear thermometer?

To change the battery in an instant ear thermometer, first, ensure the device is turned off. Locate the battery compartment, usually found on the back or bottom of the thermometer, and open it according to the manufacturer's instructions. Remove the old battery, noting its orientation, and replace it with a new one, ensuring the positive and negative ends are aligned correctly. Finally, close the battery compartment and test the thermometer to ensure it’s functioning properly.