Sony VGN-TZ10 - Manual (Page 132)

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Customizing Your VAIO Computer
Using the Power Saving Modes
When you use a battery pack as the power source for your computer, you can take advantage of 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: Sleep and Hibernate. When using battery power, you should be aware that
the computer will automatically enter Hibernate mode if the remaining battery charge becomes short, regardless of the power
management setting you select.
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If the battery level falls below 10 percent, you should either attach the AC adapter to recharge the battery pack or shut down your computer and install
a fully charged battery pack.
Using Normal Mode
This is the normal state of the computer when it is in use. The green power indicator light is on in this mode. To save power
while not working, you can turn off a specific device such as the LCD screen or the hard disk drive.
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You can change the memory configuration during Normal mode. See Changing the Performance Setting (page 140) .