Hey, I picked up my Macbook Pro in September of last year, making it about 9 1/2 months old. It's plugged in much of the time I use it, but I do take it off the power source on a regular basis. I've noticed the battery draining more quickly lately, so I took a look at the capacity reading. Here it is (from Coconut): It's at 73%. This is after a full calibration last night, where before that it read 70%. I normally calibrate approximately every two months as recommended. I do recall the reading being in the high eighties no more than four months after getting the system, which seemed somewhat odd. I've read up on some experiences with the MBP battery, but most mentions were regarding defective models acknowledged and recalled by Apple. I read at one point that a battery below 75% (or thereabouts) capacity with less than 300 cycles would be covered under warranty. Also, Apple states here (bottom right column) that the battery should retain 80% capacity after 300 cycles (but it does not go on to discuss the warranty). That said, here are my battery specs from the System Profiler: As you can see, I'm at 160 battery cycles currently - with a battery status of 'check battery'. I can't seem to find a solid answer as to what that means (not even on Apple's site). So, think I can get a replacement out of this? Is my battery of a model known to be touchy? I've heard that about Sony's in general, but I'm not sure if that's accurate. Thanks for any help you can offer!