So for a few months I've gotten the message "change battery soon" whenever I click the battery symbol in the menu bar (or a similar message, this is all translated from my native language). Then suddenly it says "change battery now". How long do I have before it's dead? I'm dreading bringing it to the mac store because I know it takes two weeks or more for them to change the battery. Plus the high expence of it. A few weeks? A few days? I can still use it after the battery is dead, right? (I know I did with my old Macbook. There the battery bloated and I just removed the battery and used the power cord all the time. A hassle, but workable) Also, how do I know what type of MacBook Pro it is? Besides the year and date (which I'll find, hopefully, in my email). Is it a unibody if there is only one solid piece of metal underneath and no separate cover for the battery? Thanks in advance.