If I had to conclude, PILOT error. The data tells a story that can be seen so many different ways, but aside from your battery not being used properly as stated previously, the 11 minutes or perfect flying until 6 seconds before its done, you crashed your drone my friend. You made a mistake i did when filming geese taking off from a river, I was following then from the side, flying sideways and trying to loop towards the front while they were starting to turn towards me, i was very well aware of the terrain, the river is my back yard, but the shot was so beautiful i zone out the line of very tall trees that line the waterside a bit further, knocked a brach and tumbled down 60m to my own faulty piloting.
Let me show you what you looked like while trying to film a train...right? or the empty tracks below.