Article ID : 00022972 / Last Modified : 03/29/2019

How to remove or replace the CMOS lithium battery.

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WARNING: Ensure the computer is shut down and disconnected from power before following this procedure.


  • Ensure the customer uses a wrist strap or otherwise discharges all static electricity before continuing.
  • Ensure the computer is on a hard, flat surface when performing this procedure.
  1. Remove the computer's side panel.
  2. Locate the CMOS lithium battery near the bottom of the motherboard.

    CMOS lithium battery

  3. Use a flat head screwdriver to gently remove the battery from the system.

    remove the battery

  4. To replace the battery, gently press it into the battery casing on the motherboard.

    battery casing