Sony PCG-XG9 - Manual (Page 24)

VAIO
®
Notebook Computer User Guide 12
To remove the battery pack
1
Open the cover of the battery bay.
2
Pull out the battery pack.
3
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 while the
computer is in System Suspend mode.