My 4th grade son used our Tello drone in science project on the effects of weight on a drone's battery life. Just wanted to report that the Tello performed well carrying weight less than 60 grams. At 60 grams of added weight the Tello drone hovered in place for a couple of minutes and then started acting crazy and landed. This occurred when the battery was still at 50%. I've attached a pic of the Tello carrying precisely 60 grams.