How to Test and Replace Your CMOS Battery - How-To Geek
https://www.howtogeek.com/893809/how-to-test-and-replace-your-cmos-battery/
WebJun 2, 2023 · Key Takeaways. To test your CMOS battery leave your PC's PSU off and unplugged overnight. If your BIOS is reset in the morning, you need a battery change. To replace the CMOS battery, locate the battery on your motherboard, press the latch holding the battery to pop it out, and install the new one.
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