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30 Chapter 2 Getting to Know Your MacBook
Using Your Power Adapter
Plugging in the power adapter provides AC power to the MacBook and recharges the
computer’s battery.
Important: For optimal performance, use only the power adapter that came with your
computer, or purchase an additional Apple MagSafe 60W Power Adapter.
When you first connect the power adapter to your computer, an indicator light on the
power adapter plug starts to glow. An amber light indicates that power is going to the
battery. A green light indicates that no power is going to the battery, which can mean
the battery is fully charged, is not installed, or has a problem. If you don’t see a light,
your plug probably isn’t seated correctly. Check for any debris and remove it. You can
monitor the battery level using the Battery status menu in the menu bar or by
checking the battery level indicator lights on the bottom of the battery (see page 74).
To extend the reach of your power adapter, first pull the AC plug up to remove it from
the adapter. Attach the included AC cord to the adapter, making sure it is seated firmly.
Plug the other end into a power outlet. The AC power cord provides a grounded
connection.
Warning: The MacBook power adapter port contains a magnet that can erase data on
a credit card, iPod, or other device. To preserve your data, keep these and other
magnetic media away from the power adapter port.