Sony PCG-R505JSP Manual

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The LED indicator on the AC adapter may be turned on until the AC adapter 
is unplugged from your notebook.

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When the AC adapter is not used, unplug it from the AC outlet.

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Use only the supplied AC adapter. Do not use any other AC adapter.

You can use a battery pack as a source of power. The battery pack that comes 
with your notebook is not fully charged at the time of purchase. Follow the steps 
below to insert and charge the battery pack.

You do not need to turn off the notebook to insert the battery pack when your 
notebook is connected to the AC adapter.

Close the cover of the notebook.

Switch the unlock/lock lever on the bottom of the notebook to the 
UNLOCK position.