MacBook Air run on electricity

The light on the power supply cable is red.

I got my MacBook Air for about a week.  I kept plugged in most of the time, while I use it.  Even today, the plug light goes from green to red.  The computer is running on battery only.  I moved the cord to several different electrical outlets.  When I plug it in, the green light goes on for 3-4 seconds and then turns red.  This happens repeatedly.

What is the problem?

How should I do?

Red means load. Medium green fully charged.

Tags: Mac OS & System Software

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