6Managing power
Your computer can operate on either battery power or external power. When the computer is running on battery power only and an AC power source is not available to charge the battery, it is important to monitor and conserve the battery charge.
Initiating and exiting Sleep and Hibernation
Windows has two
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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 the Sleep state 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 the Hibernation state.
Initiating and exiting Sleep and Hibernation 29