P1. Proper calibration, updated firmware, UI calibration, green slow flash, the whole nine yards. Using dronefly batteries as well as dronefly batteries. H3-2d, hero3. Full charge with 3amp. Behavior: Take off normal, then usually 3-5 seconds after takeoff in air, rapid red flash and loss of oomph and descend to ground even under full throttle. This happened with 2 batteries in a row, both right off the charger. Help is greatly appreciated.