VAIO User Guide
Page 77
Page 77 About the Lithium Battery The lithium battery starts to weaken after several years and the system settings, such as the date and time stored in CMOS RAM, may become inaccurate. Replace the battery only with a CR2032-type lithium battery. Replace the lithium battery when this occurs. There is danger of the battery exploding if it is replaced incorrectly.
Page 77 About the Lithium Battery The lithium battery starts to weaken after several years and the system settings, such as the date and time stored in CMOS RAM, may become inaccurate. Replace the battery only with a CR2032-type lithium battery. Replace the lithium battery when this occurs. There is danger of the battery exploding if it is replaced incorrectly.