MSI B450M-A PRO MAX II Micro-ATX Motherboard - Manual (Page 38)

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BAT1： CMOS Battery
If the CMOS battery is out of charge, the time in the BIOS will be reset and the data of
system configuration will be lost. In this case, you need to replace the CMOS battery.
Replacing CMOS battery
1. Push the retainer clip to free the battery.
2. Remove the battery from the socket.
3. Install the new CR2032 coin-cell battery with the +
sign facing up. Ensure that the retainer holds the
battery securely.
1 1 2 2
3 3
WARNING
KEEP OUT OF REACH OF CHILDREN
∙ Swallowing can lead to chemical burns, perforation of soft tissue, can death.
∙ Severe burns can occur within 2 hours of ingestion.
∙ If you think batteries might have been swallowed or placed inside any part of
the body, seek immediate medical attention.