i just bought my mbp about a month ago and a couple weeks i noticed that when its pluged in from the power adapter, the battery would ALWAYS linger around 97-99% never 100 even tho its plugged in. and to reach 100, i would have to unplug and manually drain the battery a bit to fill it back up to 100. Now, when i plug it in its at 99% then when i unplug it, it miraculously goes back to 100% huh? this doesnt make sense to me. you think i should go to the apple store for a replacement battery? the warranties covers for 90days right? i dont have the apple care plan.