i've had this mac for just under 3 years, and the battery for maybe two years (it was a recall for some reason). anyways, my problem is that the battery only lasts for 20 minutes. when fully charged it drains so quickly, not even using intense applications. i ran a few tests in coconut battery, and could only laugh at the results. 18% of original capacity. which was 5500 mAh, now 1012 mAh. battery cycles - 586. Age of this mac - 24462 months!!!!!! what is going on here?