I took my phantom 4 with me on holidays throughout australia NZ and europe catching about 12 flights domestic and international. In that time i.ve been pulled up twice. Once the security person just had a quick look and recognised the phantom4 said she had seen a few and let me thru. The second time i got stopped the old guy mumbled something about wattage and started doing some calculations on his cslculator and started mumbling about it being too high, i remembered Lynn Phans website and quickly found the airworthy certificate (which shows wattage). He then let me thru saying he did the calculations wrong! (Yes i know p=vi but i wasn.t going to tell him his calcs were wrong!) Anyway lesson learned, i will make sure i print the airworthy certificate next time! Btw all batteries were half 3/4 empty and in separate resealable plastic bags Heres tge website with certificates Phantom 4 Mods & Custom Tips by Lynh Phan - Dronethusiast Does anyone have a clearer or scanned copy of the certificate?