It seems the only time I write is when I have problems, and I do again. I have been doing some antenna combination testing, and doing some relatively high (for me) testing (yes I know the FAA ceiling is 400'). I usually fly at night over a golf course, so if (when) it comes down, it can cause no harm except to itself. I had several repeat trips up to 1200', and was working on extended distances out, and had NO issues. For fun, I decided to use 3 blade balanced graphite props for a change. It went up fine, but at about 50% battery, I decided to come down, and it would not descend, it seemed. Perhaps a foot per secend, and it was being blown by a 5-10 mph breeze away, and there was nothing I could do, yet I still had full video and control radio contact. The battery was discharging incredibly fast at seemed, and I was still over 1000 up and 1000+ away (it had drifted almost that much) when I decided to turn it off to invoke "go to home". It showed that it was engaged, but it was not returning. At about 10% battery I turned it on, flicked the right switch to the middle position (atti? I have not used it before), and I had FULL control, and started cooking towards home. Well, at about 3% and 400' up and out, the lights went out and it fell to the ground. Once I got the "find my Phantom" feature figured out, I was able to find it in the pitch dark and fortunately it did not go in the water. So, can anyone suggest what may have happened? Why did I seem to get full control and response when I went into the Atti mode (again, I am not familiar with it). Could the 3 blade props have caused the situation (keeping in mind that I had flown virtually the same course previously that night with 2 blade graphite blades with no issues).