Managing The Battery Power; Power-Saving Modes - Lenovo ThinkPad X240 User Manual

Managing the battery power

To achieve the best balance between performance and power saving, adjust your power plan settings.
To access power plan settings, do the following:
• For Windows 7: Start the Power Manager program and then click the Power Plan tab. For instructions
on how to start the Power Manager program, see "Accessing Lenovo programs on the Windows 7
operating system" on page 12.
• For Windows 8 and Windows 8.1: Right-click the battery-status icon in the Windows notification area
and click Power Options. Then click Change plan settings next to your power plan.
For more information, refer to the help information system of the program.

Power-saving modes

There are several modes that you can use at any time to conserve power. This section introduces each
mode and gives tips on the effective use of battery power.
• Screen blank (for Windows 7 only)
The computer display requires considerable battery power. To turn off the power to the display and
make the computer enter screen blank mode, right-click the battery gauge icon from the Windows
notification area and select Power off display.
• Sleep
In sleep mode, your work is saved to memory, and then the solid-state drive or the hard disk drive and the
computer display are turned off. When your computer wakes up, your work is restored within seconds.
To put your computer into sleep mode, press Fn+4 or do the following:
– For Windows 7: Use the Start menu shutdown option.
– For Windows 8 and Windows 8.1: Move the pointer to the bottom right corner of the screen to bring
up the charms. Then click Settings ➙ Power ➙ Sleep.
Depending on the model, your computer might support the 30 Day Standby function. When this function
is enabled, the computer consumes even less power in sleep mode and takes only seconds to resume
normal operation when you press the power button. For more information about the 30 Day Standby
function, do the following:
– For Windows 7: Refer to the help information system of the Power Manager program. For instructions
on how to start the Power Manager program, see "Lenovo programs" on page 12.
– For Windows 8 and Windows 8.1: Open the Lenovo Settings program and click Power.
• Hibernation
By using this mode, you can turn off your computer completely without saving files or exiting any
programs that are running. When the computer enters hibernation mode, all open programs, folders, and
files are saved to the hard disk drive or solid-state drive, and then the computer turns off.
If you put your computer into hibernation mode with the wake-up function disabled, the computer does
not consume any power. The wake-up function is disabled by default. If you put your computer into
hibernation mode with the wake-up function enabled, the computer consumes a small amount of power.
To enable the wake-up function, do the following:
1. Go to Control Panel and click System and Security.
2. Click Administrative Tools.
3. Click Task Scheduler. If you are prompted for an administrator password or confirmation, type the
password or provide confirmation.
4. From the left pane, select the task folder for which you want to enable the wake-up function. The
scheduled tasks are displayed.
.
Chapter 2 Using your computer
29