Panasonic Toughbook CF-31 CMOS Battery

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Panasonic Toughbook CF-31 CMOS Battery

Having a functioning CMOS battery for your Panasonic Toughbook CF-31 is essential. This battery is critical for your CF-31 to shut down and start up correctly. 

Purpose of the CMOS Battery

The BIOS firmware in your Toughbook is powered by the CMOS battery even when your laptop is off. The BIOS must function even while the unit is off so that it will be able to start back up. 

The signs of a malfunctioning CMOS Battery

If you are experiencing the following, your Toughbook may need a new CMOS battery.

  • You might notice that your Toughbook may stop booting up or have booting issues. 
  • You can see that the date and time will reset automatically. 
  • You will hear a constant beeping sound from the system board.
  • There will start to be issues with peripherals.
  • Hardware drivers may malfunction or disappear.
  • You will not be able to connect to the internet.

Please let us know your Toughbook's complete model number. So you receive the correct battery for your Toughbook. For assistance with replacing or installing a CMOS battery in your Toughbook, please email us at There is also an installation walkthrough at the bottom of this page. 

Order a CMOS battery for your Toughbook by using the "Add to Cart" button on the right side of the screen to order online or over the phone at 877-202-7788.

Part Type CMOS Battery
This part comes with our 30-day warranty

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