So, this is my second mac in two weeks (Penryn base model, first one had screen issues) and so far it's been great. Yesterday when I was playing DVD on battery, the bottom got really hot (can't touch it) and battery drained pretty fast. So, I stopped playing and closed all applications. I noticed that the battery were still draining fast as if I were still playing DVD and the bottom was still hot. I called mac support and I was told to bring the mac in to the local store and have it checked. The tech believed that the original battery capacity on my mac is too high.... Today I installed "coconut battery" and I noticed that the original battery capacity is 5600 mAh and the current battery capacity is 5546 mAh, which is 99%. It's only been 4 charging cycles. And I notice that the "age of your Mac" is 8 weeks, which is really bizarre to me since the "penryn" just came out on Feburary 26th. I just don't know if there is something wrong with my battery or the system. Did this happen to you guys before? I really don't want to bring this mac in again for repair or exchange - I visited the store 3 times already... Thanks guys.