I got 23min the other day taking it down to 9% battery, just to test what happens at 10% with auto land. I usually land around 20%. The 23min flight was NOT a hover test either, I had about 600' elevation gain going up a hill, looking on the other side, as well as some flat flying around the area. I was surprised to get 23min. I think the batteries work better after about 15 charges because when my P4 was new I remember being disappointed with 18min flight with 25% left. I did noticed during my 9% test that the battery seems to burn off faster between 25% and 9% versus the middle of the battery, however that could have been my imagination.