I think I'm having issues with my 2 month old 15" MBP Penryn laptop. I say this because my battery health monitor is telling me my original capacity was at like 5600mAh and now I'm down to like 5200mAh. I've done the whole disable hibernation thing and whatnot to condition the battery like Apple recommends. so I want to ask the people who own this same laptop what kind of runtimes do you get on a fully charged battery? I'm getting about 3.5 hours with the screen brightness at 100% while running Firefox and playing a DVD. (I don't like my screen dimming at all.) I'm just wondering if the drop in battery health and if my current battery runtimes are normal for a laptop this young? I've already lost 400mAh in battery capacity and I don't think that's normal. So please post what your runtimes are with this same exact laptop with the screen at 100%.