I was just wondering what the standard warranty is for the MBP battery? I have a 3-year AppleCare, but I know the battery isn't covered. Using iStat Pro, my battery health is 56%. On a full charge, the battery lasts 1 hour 45 minutes. This isn't bad compared to some of my PC friends whose last less than 1 hour, but is far worse than the 4 hours I was getting when the laptop was new. I know about calibrating. I've done it at least once a month (usually twice) since I purchased the MBP. I bought it in August '07.