💻 Software
CMOS, BIOS and battery
Fresh7 days ago
Mar 15, 2026489 viewsConfidence Score0%
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Problem
As far as I know, if the BIOS has a password set, you can reset it by removing the battery and inserting it again. Why is this so? Do all the CMOS settings reset to default after such a manipulation with the battery? What exactly happens to all the settings when reinserting the battery?
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1 Fix
Canonical Fix
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New Fix – Awaiting Verification
Fix for: CMOS, BIOS and battery
Low Risk
Well, this is the wrong site to ask this (it's not programming related), but here goes: the battery is primarily needed to drive the RTC (real time clock) which needs to keep running even if the computer is powered off. The BIOS often has a dedicate…
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