recently the battery on my macbook has been fucking up. I give it a full charge and use it for an hour and a half. when it gets down to about 13% charge the laltop dies. I mean it completly dies. doesn't go into sleep mode or anything, i don't even get a warning. now, push the botton on the battery and none ot the green lights flash. so i end up pluging it back in and restart the computer and computer still shows a 13% charge. I've already done 3 recalibrationsthis week, reset of the PMU, deleting the PMU.plist file. all the updates have been done including the battery update. At this point should I call applecare and demand a new batery? I mean I did buy the extended warranty.