So I was flying with just under 75% battery. I flew over a river and was getting footage of a field to do an ND filter test. I had a good signal, and everything was normal. I changed out of manual mode and was ready to do my second shot and I got a low voltage warning. Then the app crashed. It started to land, and it was coming back home over the river. I looked through at the camera and decided to bring it down in the field rather than let it come down in the river. I lost total connection with the app. This is an area that I have done dozens of flights without incident. When I got closer to the field the app reconnected with the Phantom. I tried to initiate a takeoff, but it kept resetting the home point. The battery finally died and I lost connection It took me an hour 1/2 to walk through hip deep grass to find it. I am currently charging the battery to see if it is ok. Just thought I would share. Time to do a tick search.