How to Change a Desktop Battery Inside a CPU

How to Change a Desktop Battery Inside a CPU thumbnail
The battery on the motherboard is used to save the BIOS configuration and can be replaced when it can no longer be recharged.

All batteries wear down and need to be replaced--even inside a computer. Changing the battery inside the computer or central processing unit, also known as the CPU, is a quick and easy fix. That battery is used to save the basic input-output settings (BIOS) when the computer is off or disconnected from the power supply. When the battery runs out, the BIOS settings (date, boot order and other settings) are lost and will require a reentering of the data each time the computer is turned on. Most motherboards use a standard CR2032 button battery.

Things You'll Need

  • Phillips demagnetized screwdriver
  • CR2032 battery
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Instructions

    • 1

      Turn the computer off and disconnect all the cables from it. Make sure to memorize or write down the location of each cable. Touch the metal part of the case to ground yourself and avoid static shocks. Remember to use a demagnetized screwdriver.

    • 2

      Lay the computer on its right side and turn it so the back faces you. Take the screw off the side panel and open the case.

    • 3

      Locate the CR2032 battery on the motherboard. Its appearance is similar to that of a watch battery only larger. Use your fingers to remove it from its socket. Insert the new battery and push it down to lock it in place. Make sure the battery is securely in place before closing the case and reconnecting the cables.

    • 4

      Turn the computer on. Press "ESC" "Delete" or "F2" to enter the BIOS. Enter the time and date and the boot order of hard drives. Reenter any custom settings previously used. Save and exit the BIOS to reboot the computer.

Tips & Warnings

  • You may use a small screw driver to push the latch and free the battery .

  • If you decide to use a screwdriver, be careful as any scratch on the motherboard can destroy it.

  • Check the manufacturer's Website for verification of the battery type on the motherboard.

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References

  • Photo Credit motherboard image by jovica antoski from Fotolia.com

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