Hi, First time posting, been long time lurking. i've searched the forum but it seems none having the same issue as me. my mbp is the 15" 2.4 ghz santa rosa, bought it in march last year. i've always use my mbp connected to an external monitor and power adapter, and i've always calibrate the battery once every 1-2 months. but lately the battery been gaining capacity, it's steady gaining from 5700, 5800 and now the maximum number is 6141, it's something that i'm grateful, but the normal capacity is 5600 mah my question is : is this something i have to worry or not ?