Sony VGN-FS775P - Manual (Page 21)

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Getting Started
Charging the Battery Pack
The battery pack supplied with your computer is not fully charged at the time of purchase.
To charge the battery pack
1 Install the battery pack.
2 Connect the AC adapter to the computer.
The computer automatically charges the battery (the battery indicator light flashes in a double blink pattern as the battery
charges). When the battery is about 85% charged, the battery indicator turns off.
Battery indicator light status Meaning
On The computer is using battery power.
Blinks The battery is running out of power.
Double blinks The battery is charging.
Off The computer is using AC power.