Apple MacBook Air (13-inch, Mid 2011) - Manual (Page 10)

10 Chapter 1 Ready, Set Up, Go
Step 1: Plug in the 45W MagSafe Power Adapter to provide power to the
MacBook Air and charge the battery.
Make sure the AC plug is fully inserted into the power adapter and the electrical
prongs on your AC plug are in their completely extended position. Insert the AC
plug of your power adapter into a power outlet and the MagSafe connector into the
MagSafe power port. As the MagSafe connector gets close to the port, you’ll feel a
magnetic pull drawing it in.
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AC power cord
AC plug MagSafe power port MagSafe connector
To extend the reach of your power adapter, replace the AC plug with the included AC
power cord. First pull the AC plug up to remove it from the adapter, and then attach
the AC power cord to the adapter, making sure it’s seated firmly. Plug the other end
into a power outlet.
When disconnecting the power adapter from an outlet or from your MacBook Air,
pull the plug, not the cord.