Hi guys, I know there are a million threads about battery health, and whatnot, but I guess i just want to make sure i have something before i try to call apple. anyway, I have a 2nd gen (non SR) MBP (2.16, 15"... see sig). and i've had it for 15 months. when i first got it, the battery would last 3 - 3.5 hours on a full charge. (wifi on, bt off, brightness 50%). now, after only 73 cycles, it fluctuates between 50-75% battery health (after calibration), and gives me only 2:15 max... right now it's at 80% health, but that never stays stable for long... after reading a lot of threads about other's w/ bad batteries, i'm a bit confused as to if i should be concerned. some ppl who have got theirs replaced had it really bad.. others, not so much. Hence my confusion... Is my battery faulty? or is it just going through it's normal life cycle. So any thoughts or advice would be very welcome! please lend me some wisdom! thanks!