Okay, im a freakish worry wart about my macbook. Recently, and by recently i mean last week, i checked my battery health on Istat. it was about 86%. I checked it tonight, it was at 80%. If i recalibrate it, would it increase the health of the battery? I dont want to drop more money for a battery soon, i already had to pay a crapload of money for the frayed power cord six months ago.