Hello, so I purchased a 2012 Macbook Pro 15 that I thought needed a new battery (and it still might) but upon closer inspection, it shows that the max charge capacity is 7000+ and that it has only 16 cycles. The OS says that the battery needs to be replaced and when plugged in, the battery will not charge. I've tried doing various resets (SMC) to no availability. I even reinstalled the OS. Could there be a problem with the battery itself which is preventing it from charging? Thanks.