Hey guys I was wondering how did the battery full charged capacity drop so low from the original 6851mAh when I first got my MacBook. My usage on battery isn't high. I plug in when I'm inside and use it on battery when access to a wall socket is inconvenient or simply just unavailable. I'm only at my 7th cycle now but my full charge capacity his sitting on only 6484 mAh. Should I be worried? Thanks in advance.