Sony R505 Handbuch

When you use a battery as the source of power for your computer, you can use 
the power management settings to conserve battery life. In addition to the normal 
operating mode, which allows you to turn off specific devices, your computer has 
two distinct power saving modes: Standby and Hibernate. When using battery 
power, be aware that the computer automatically enters Hibernate mode when the 
remaining battery charge drops below 5 percent, regardless of the power 
management setting you select.

Normal mode is the normal state of your computer when it is in use. The power 
indicator displays green when your computer is in this mode. To save power, you 
can turn off a specific device such as the LCD or the hard disk drive.

In Standby mode the computer saves the current state of the system in RAM and 
switches off power to the CPU. The amber power indicator flashes in this mode.

Press the key combination Fn + Esc.

Press any key to return to normal mode.

In the Hibernate mode, the state of the system is saved on the hard drive and 
power is turned off. The power indicator is off in this mode. 

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If the battery level falls below 10 percent, you should either attach the AC adapter to 
recharge the battery or turn off your computer and insert a fully charged battery.