Sony PCG-K415B User Manual page 21

PCG-K series
To remove the battery pack, proceed as follows:
1 Turn off your computer and close the LCD.
2 Open the cover of the battery bay.
3 Pull out the battery pack.
4 Close the cover of the battery bay.
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 pack while the
computer is in Standby mode.
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Using your VAIO computer