1. Locate the small hole on the black side facing the user.
2. Gently push the included pin into this hole and push in.
Alternatively you can use a safety pin.
3. Push the pin gently to the left side.
4. The battery compartment will slide out. Replace the battery (3V
lithium cell, 3V CR2032 ). Verify that the battery is inserted with the right polarity ( + side is facing down ).
