Sony VAIO PCV-RS310 Reference Manual page 48

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VAIO Computer System Reference Manual
Replacing the lithium battery (PCV-RS310 series model)
Remove the old battery and install the new battery with the plus (+)
side up.
Installing a lithium battery (PCV-RS310 series model)
8
Replace the cover. See
The values stored in the CMOS memory are now reset to the factory
default values. Run the Setup utility to reset the date, time, passwords,
and other changes you may have made to the BIOS settings. If you do not
wish to customize your BIOS settings, do not run the Setup utility.
!
Dispose of the lithium battery properly. In some areas, the disposal of lithium
batteries in household or business trash may be prohibited. You can return your
unwanted lithium batteries to your nearest Sony Service Center or Factory
Service Center. To locate a Service Center near you, visit the Sony Computing
Support Web site at http://www.sony.com/pcsupport
"Replacing the cover."