Sony PCG-FXA53 - Manual (Page 21)

Connecting a Power Source
21
3 Push the battery bay cover up until it clicks.
To charge the battery pack
1 Connect the AC adapter to the notebook.
2 Insert the battery pack.
The notebook automatically charges the battery. The battery indicator
flashes in a double-blink pattern as the battery charges.
3 When the battery is 85 percent full, the battery indicator turns off. This
process takes several hours. It takes longer to recharge the battery when the
notebook is turned on than when it is turned off.
Inserting battery pack
✍
If the port replicator is attached to your notebook, do not attempt to insert or remove
the battery pack. Lifting and turning the notebook with a port replicator attached could
cause a temporary loss of power.
✍
To charge the battery completely, continue charging for an additional hour.
Battery pack
(supplied)
Label side facing down