a little over a month ago i calibrated my battery. all is fine. battery health 99% ; battery capacity 98% about once or twice a week i exercise my battery for a couple hours. stats were about the same until today, i calibrated my battery again. battery health dropped to 96% and capacity dropped to 92% by recalibrating, i lost 3% health and 6% capacity. should running down the battery for calibration cost so much health?