My 17" MBP battery's been acting up lately. It only lasts 2 hours and 15 minutes MAX. This is with airport/bluetooth both turned off, and screen dimmed to one bar. The only app I have running is Word. My battery used to last upwards of four hours while using the exact same settings. Anyone know what's wrong? I callibrated my battery 3 weeks ago, and here is a coconut battery screenshot: