Sony PCG-R505ELK - Manual (Page 28)

Using Power Saving Modes
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.
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.
Page 28