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PC CMOS battery failure: symptoms and replacement guide

A computer's CMOS battery is essential for maintaining the system's real-time clock and preserving BIOS/UEFI settings when the computer is powered off. These coin-cell batteries, commonly CR2032, can last several years but eventually need replacement. Signs of a failing CMOS battery include the system losing track of the date and time, resetting to default values upon boot, and potentially causing issues with HTTPS connections. When completely dead, the computer will display a warning and revert to factory settings for boot order and fan configurations. AI

RANK_REASON Article explains a common hardware maintenance issue and its resolution.

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PC CMOS battery failure: symptoms and replacement guide

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4 / 100
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Tool
Article explains a common hardware maintenance issue and its resolution.
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COVERAGE [1]

  1. Engadget TIER_1 English(EN) · [email protected] (Calvin Wankhede) ·

    What happens when your PC's CMOS battery dies?

    The CMOS battery isn't something you'll need to change often. But when it goes, it's time for a quick swap.