What is happening to my battery?

http://i.imgur.com/N5NqvOY.jpg
What the **** is happening to my battery? I'm getting less than 2 hours on a full charge, and just while typing this, my battery went down from 41 to 38%.
System information :  
Charge Information:
  Charge Remaining (mAh):     1786
  Fully Charged:     No
  Charging:     No
  Full Charge Capacity (mAh):     4772
This is the Haswell MBA 11 inch base model, got it in August.

Reset SMC.     http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
A new Mac comes with 90 days of free tech support from AppleCare.
AppleCare: 1-800-275-2273
Call AppleCare.
Best.

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