Sony PCG-XG28 Primary User Manual page 25

Your computer operates on 100V-240V AC 50/60 Hz.
Do not share the AC outlet with other power-consuming equipment,
such as a copy machine or shredder.
You can purchase a power strip with a surge protector. This device
prevents damage to your computer caused by sudden power surges
such as those that may occur during an electrical storm.
Do not place heavy objects on the power cord.
To disconnect the cord, pull it out by the plug. Never pull the cord
itself.
Unplug your computer from the wall outlet if you will not be using
the computer for a long time.
When the AC adapter is not used, unplug it from the AC outlet.
Use only the AC adapter supplied. Do not use any other AC adapter.
You can use one or two battery packs as a source of power. The second
battery pack inserts into the drive bay on the right side of the computer.
(See "Using Power Saving Modes" on page 52.) Additional battery packs
are available as a separate option.
The battery pack that comes with your computer is not fully charged at
the time of purchase. Follow the steps below to insert and charge the
battery pack.
Open the cover of the battery bay on the left side of the computer.