Sony PCG-F640 VAIO User Guide (primary manual) User Manual page 27

Insert the battery pack into the battery bay on the left side of the computer.
2
Inserting battery pack
3 Close the cover of the battery bay until it clicks.
If the port replicator is attached to your computer, do not attempt to insert or remove
the battery pack. Lifting and turning the computer with a port replicator attached could
cause a temporary loss of power.
To charge the battery pack
1 Connect the AC adapter to the computer.
Insert the battery pack.
2
The computer automatically charges the battery (the battery indicator light flashes in a
double blink pattern as the battery charges).
3 When the battery is 85% full, the battery indicator light turns off. This
process takes approximately two hours.
To charge the battery completely, continue charging for an additional hour. See
"Displaying Battery Information" in the online manual "Customizing Your VAIO®
Notebook" .
Battery pack
(supplied)
Connecting a Power Source
Label side facing down
27