To change the batteries, do the following:

1. Loosen the screw on the battery compartment door located on the left side of the headphone earpiece.
2. Replace the two AAA batteries in the compartment. Make sure that they are installed correctly, using the diagram on the inside of the battery compartment.
3. Tighten the screw to close the compartment door.

If the headphones are to be stored for a long period of time, remove the batteries and keep them in a cool, dry place.