Sony VAIO PCG-FR215M User Manual page 23

Using your notebook
Charging the battery pack
To charge the battery pack, proceed as follows:
1 Connect the AC adapter to the computer.
2 Insert the battery pack.
The computer automatically charges the battery (the battery indicator light flashes in a double blink
pattern as the battery charges). When the battery is 85% full, the battery indicator light turns off. This
process takes approximately 2.5 hours if your notebook is on. To charge the battery completely, continue
charging for an additional hour.
Indicates the status of the battery pack in the battery bay.
battery indicator meaning
light status
On The computer is using battery power.
Single blink The battery is running out of power.
Double blink The battery is charging.
Off The computer is using AC power.
Keep the battery pack in the computer while it is directly connected to AC
power. The battery pack continues to charge while you are using the
computer.
If the battery level falls below 10%, you should either attach the AC adapter
to recharge the battery or shut down your computer and insert a fully
charged battery.
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