Macbook battery gaining capacity

Is it normal for my battery capacity to be increasing??? It was over 5300 a few days ago, but I thought nothing of it. But, it's kind of strange having the only laptop in my school who's battery life hasnt decreased a bit. Most of my friends are at 95-100%, while mine holds between 103% and 107%...

Oh and btw, I'm new here. Glad to be part.

Not out of the ordinary, especially if you calibrate yours and they don't.

My wife's approx 30 month old sits at about 105% or so.