Be sure to read and follow the safety guidelines to protect your computer from potential damage and ensure your personal safety. For more information about safety guidelines, see the owner's manual at Dell.com/support. Before you begin, turn off the computer and disconnect all the attached peripherals.
To remove the coin cell battery, remove the two screws securing the system's side cover to lift the cover off the system. Identify the coin cell battery and use a flathead screwdriver to pry it out of the system.
To reinstall the coin cell battery, place it back in the system and press it down until it clicks. Secure the system's side cover with the 2 screws. Please note, the system will only power on an exit service mode if the adapter is connected. For more information about your Dell system, visit dell.com/support.