I have a 15" macbook pro I purchased in early 2009. I got it just after the unibody models came out, the ones with the replaceable battery. When I got it, it obviously had OS 10.5, and the battery lasted right around 3 hours, maybe more if I was lucky. I recently installed OS 10.6 and now the battery isn't even lasting 2 hours! Up until the day I installed 10.6, 10.5 was lasting 3 hours or more. Does anyone know why this could be happening? I've checked to make sure it's running off the 9400M, and it is. I installed coconut battery and it says I'm at 97% capacity. The battery icon in the menu bar doesn't say it needs to be replaced. What's the deal?