So I have a 7 month old MBP. Within the past month, my battery capacity has plummeted. At the end of December/beginning of January I was getting 3ish hours of battery life. Since then, and checking coconutBattery, my battery now gets less than an hour and has 48% of its capacity. I know I haven't calibrated it often enough, so i'm running through that a few times to see if it gets back up. I seem to remember some warranty issue with batteries. If they lose a certain amount of capacity within a certain amount of time you get a free replacement? Any other suggestions?