Sony PCG-SR27K 사용자 설명서

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Connecting a Power Source
19
Keep the battery pack in the notebook while it is directly connected to AC 
power. The battery pack continues to charge while you are using the notebook.
If your battery level falls to less than 10%, you should either attach the AC 
adapter to recharge the battery or shut down your notebook and insert a fully-
charged battery.
You can extend battery life by changing the power management modes in the 
Power Panel utility. See “Power Saving Modes” 
The battery pack supplied with your notebook is a lithium ion battery and can 
be recharged at any time. Charging a partially discharged battery does not 
affect battery life.
The battery indicator light is on while you use the battery pack as a power 
source. When battery life is nearly depleted, the battery indicator starts 
flashing.
Your notebook may not enter Hibernate mode when the battery life is low, when 
certain software applications are running, or when certain peripheral devices 
are connected. To avoid loss of data when using battery power, you should save 
your data frequently and manually activate a power management modes.