This was my First macbook pro 13 mid 2012, should i ran it using battery or used it plug in.. Please advise. Its been a month already and what i normally do is run it in baterry until drain off to about 10% thenplug it in till full charge,, Now istat showing me of 96% with just 12 loadcycles. Is this normal or my battery is defective? Any advise is much appreciated. Thanks in advance,.