Lenovo G556 User Manual page 34

Notebook computer
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Plug the AC adapter's connector into the DC-IN connector on the rear of the
computer.
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2
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Connect the power cord to the AC adapter and then to a wall outlet.
The best kind of AC power source to connect your Notebook to is a UPS
(Uninterruptible Power Supply). Lacking this, use a power strip with a built-
in surge protector. Do not use inferior extension cords as this may result in
damage to your Notebook. The Notebook comes with its own AC adapter.
Do not use a different adapter to power the computer and other electrical
devices.
Whenever possible, keep the AC adapter plugged into the Notebook and an electrical
outlet to recharge the battery.
Never turn off or reset your Notebook while the hard disk is in use and the
HDD status icon is lit; doing so can result in loss or destruction of your data.
Always wait at least 5 seconds after turning off your Notebook before
turning it back on; turning the power on and off in rapid succession can
damage the Notebook's electrical circuitry.
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