I bought my Unibody Macbook about a year and a half ago, and now all of a sudden it won't even hold a charge! Coconut battery and SystemProfiler says it's capacity is now 241 mAh. It's original capacity was 4100 mAh. How can this be? And can I maybe ask for a free replacement this happened much too quickly in my opinion. Has anyone had a similar experience before? I can't run my Macbook without even having it plugged in anymore! My older laptop's battery never died so quickly.