First of all, i know that battery status numbers are approximately relevant and may vary back and forth, but there is a thing that bothers me a bit about my brand new MC374 MBP - after few weeks of usage (5th full cycle to be accurate) the battery abruptly dropped 5% of capacity from 5700 to 5400. What may have caused such issue? Can it be considered normal or i need to worry? I'll try to recalibrate the battery and see what happens with numbers, but i'd like to hear some thoughts from other more experienced users. Thanks in advance.