It is important to understand the CMOS sensor. It is a type of electronic chip capable of storing and retaining information, even when the computer is turned off, unlike random access memory (RAM), for example. A low electrical current is sent by the CMOS battery to power this memory. Its visual appearance is typically similar to a circular flat battery, resembling the type found in watches. Before booting your operating system, the BIOS reads the information stored in this memory during startup, such as the date and time. It is therefore essential for the proper functioning of your computer, as it plays a role in the initial stages of its startup. Removing the battery means turning off the CMOS sensor and erasing all the information stored on it. This can be useful, in fact, for resetting the BIOS if the need arises.
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