Sony VGN-FS800 - Manual (Page 23)

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Getting Started
Removing the Battery Pack
!
You may lose data if you remove the battery pack while the computer is on and not connected to the AC adapter or if you remove the battery while the
computer is in Standby mode.
To remove the battery pack
1 Turn off the computer and close the LCD screen lid.
2 Slide the lock switch (1) to the UNLOCK position.
3 Slide and hold the release latch (2) and slide the battery away from the computer.