6 Managing power

Your computer can operate on either battery power or external power. When the computer is only running on battery power and an AC power source is not available to charge the battery, it is important to monitor and conserve the battery charge. Your computer supports power plans to manage how your computer uses and conserves power so that you can balance computer performance with power conservation.

IMPORTANT: Do not attempt to replace your computer battery, which is installed at the factory.

Your computer has an internal rechargeable battery that can be replaced only by an authorized service provider. To monitor the status of your battery, or if the battery is no longer holding a charge, run Battery Check in Help and Support. To access Help and Support, from the Start screen, type help, and then select Help and Support from the list of apps. If Battery Check indicates that your battery should be replaced, contact support.

Initiating Sleep and Hibernation

Microsoft® Windows has two power-saving states, Sleep and Hibernation.

●Sleep–The Sleep state is automatically initiated after a period of inactivity when running on battery power or on external power. Your work is saved to memory, allowing you to resume your work very quickly. You can also initiate Sleep manually. For more information, see Initiating and exiting Sleep on page 33

●The Hibernation state is automatically initiated if the battery reaches a critical level. In the Hibernation state, your work is saved to a hibernation file and the computer powers down.

NOTE: If you want to initiate Hibernation manually, you must enable Hibernation using Power Options. For more information, see Enabling and exiting user-initiated Hibernation on page 34

CAUTION: To reduce the risk of possible audio and video degradation, loss of audio or video playback functionality, or loss of information, do not initiate Sleep while reading from or writing to a disc or an external media card.

NOTE: You cannot initiate any type of networking connection or perform any computer functions while the computer is in the Sleep state or in Hibernation.

Initiating and exiting Sleep

With the computer on, you can initiate Sleep in any of the following ways:

●Close the display.

●From the Start screen, point to the upper-right or lower-right corner of the screen. When the charms list opens, click Settings, click the Power icon, and then click Sleep.

To exit Sleep:

●Briefly press the power button.

●If the display is closed, open the display.

Initiating Sleep and Hibernation 33