Just wondering, but how rare is it to have a battery that lasts 3 times longer than the "rated cycle amount"? Apparently this battery should have been dead 600 cycles ago... I am finally now noticing a slight loss in overall battery life. I have used this MacBook 100% of the time since the day I have gotten it over two years ago. Is this why it has lived so long? Edit: The battery life just went up to 80%.