This is a 1.83 MacBook Pro with latest software updates. I have been using it for quite a while running on battery power and until 3 day ago (I bought it @ beginning of March) this had never happened to me. While using the MacBook on battery power, the machine would just shut itself when it reached ~50% battery. No warnings or anything, just BOOM, off. This is mega risky since hardware does not like these kinds of turn-offs. I am in Munich right now and its kinda hard to coordinate a call with Apple. I also do not want to schedule a return since I live in Costa Rica. I will be in Calfornia in a week and then in Boston for another week. Like I have mentioned before, I want to avoid returning it for repair since its extremely difficult to coordinate the sending of the MacBook back at me. Has this happened to anyone else? Is there a fix for this? Thanks.