Sony VAIO PCG-F160 Software Manual page 19

Battery Icon Descriptions
Battery icon Battery status
Discharging
Fully charged
Charging
Not in use
No battery
Displaying Detailed Battery Information
You can obtain detailed information about the batteries.
Double-click the battery icon on the task tray to display the
BatteryScope window.
The screen appears displaying the General tab, which contains
information such as the estimated time-to-empty and charging time.
Customizing Your Notebook Computer
21