Hi there! My iBooks battery is totaly giving up on me. Its 20 months old and ive used it every day since i bought it. For the first 12-16 months i charged and discharged the battery on an atleast weekly basis. But the last couple of months iv only done it monthly. This last holiday spelled doom for my battery. In a very short time the capasity is down to less than 2h, after a full charge. The odd thing is it stops charging at about 68-72%. I've tried recalibrating the battery but without success. I have no idea what is happening.... Any clues? And... yea.... i do not have AppleCare.... Gratefull for feedback!