I just got a used macbook air 2014 last week and when i got it the battery was around 175 cycles. Its covered in warranty until June. So i just noticed today that the battery of my macbook air is going over its design capacity. I tried searching it on the internet but the closest thing i could find was articles about the new ipad. So my question is: Is this sign of a faulty or dying battery? Can i get it replaced at an apple store? Thanks.