When I first got my Macbook Pro replacement last week, when I would charge up to 100% battery, then unplug, it would drop 1% at a time as the battery was used up. Now when I charge to 100% and unplug, within 1 minute the power jumps from 100% to 96% all at once. Then from 96% it goes down 1% at a time until it runs down. I've tried to calibrate the battery. I'm not sure what else it could be. Does anyone else have this issue? Is there something wrong with my battery? Thanks!