I have my rMBP for 14 months, during the first month I barly used it and it was off most of the time. today I'm connecting it to a display (unfortunately the fonts are blurry!) and the lid is closed most of the time. the power charger is connected most of the time (prevents the computer from sleeping). from time to time I'm openening the lid and disconnect the charger to let the battary drain.
Is it normal that my max charge decreased to 98%?