I'm not having a problem, rather just a thought. Do any of you actually calibrate your batteries? Are you even aware that you should do this? I've just finished doing it and it made some improvements - the iStat Nano widget showed that it created about +4% battery health, which was good. It seems a bit of a hassle though so I thought some people probably just won't bother, or they don't know about it. Some thoughts/experiences would be appreciated. Thanks.