Replace the battery

1. Lever the front flap open with a screwdriver and remove it.

2. Carefully pull the battery from the bracket. Use insulated, non-conductive tools if you cannot grip the battery with your fingers.
Replace the battery 1:

3. Push the new battery into the battery compartment. The positive pole points to the left towards the DVI-D interface.
Replace the battery 2:

The battery change is complete. Close the front flap and check the date and time.