How to Replace the Coincell Battery on OptiPlex 3090

This video will demonstrate the removal and reinstallation procedure of a coincell battery for OptiPlex 3090.

To remove the coin cell battery, loosen the two screws securing the side cover. Lift the cover off the system. Identify the coin cell battery and remove it.

To reinstall the coin cell battery, place it in the system and press it down until you hear a click. Put the side cover back on and secure it with the two screws.