How is the duck head power adapter used?

I got a duck head power adapter with my MacBook Air. I also got the wall plug which I use to charge the Mac. What is the duck head power adapter used? I don't see a port for it on my computer.


Thank you.

MacBook Air, OS X El Capitan (10.11.2)

Posted on Dec 28, 2015 9:03 AM

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How is the duck head power adapter used?

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