Using Battery Power - Sony Vaio PCG-R505DL Service Manual

The LED indicator on the AC adapter may be turned on until the AC adapter
is unplugged from your notebook.
When the AC adapter is not used, unplug it from the AC outlet.
Use only the supplied AC adapter. Do not use any other AC adapter.

Using battery power

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.
To insert 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.
1 Close the cover of the notebook.
2 Switch the Unlock/Lock switch on the bottom of the notebook to the Unlock
position.
Unlock/Lock Lever
Connecting a Power Source
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