I've owned my 15" mbp for about two months and the battery has done 30 cycles. Coconut battery and istat pro both state that the current battery health/ maximum charge is at 96% or 97%. I have been doing calibrations once a month and followed the macrumors guide for looking after the battery. Should I be worried about the loss of charge? The manual states the battery should last for 1000 cycles before reaching 80% charge.