After firmware update of AC, RC's and Batts yesterday morning, I flew all six Batts in the late afternoon/evening (5 - 47's and 1 - 48). All the 47's turned in 16 minute flight times to <5%. The 48 turned in a flight time of 20 minutes to <5%. Aircraft flew flawlessly throughout the Batt re-cal. Rock solid. Speed in both GPS and ATTI were consistent at 39-40mph +/- 1 into and with the wind @ <4mph @ an altitude of ~ 60 ft AGL.