I have been getting flights of around 18-19 minutes on the Typhoon on the first two flights. Last weekend I flew it in 10-15mph gusty winds off of an island here in Florida. It flew well and produced very smooth video considering the wind but lasted around 15 minutes. This weekend, I took my Typhoon out in the boat for a follow me flight in calm weather, just a slight breeze occasionally. I set up the framing and then took off in the boat. I kept the drone only about 50 feet away and around 30 feet high as it followed my boat. I drove down the coast a few minutes and then re-framed the shot off the front of the boat looking backwards. At that time I looked at the battery and saw 11.1V. I should have landed but a lot was going on and I saw under 10 minutes of flight time and thought I would be okay and th waves, the sun... it made it hard to focus I suppose. I drove a litttle again, just maybe one-two minutes, did a u-turn to bring it in for a landing and when we looked back, it wasn't there. We then looked at the controller and saw the final video frame which was about 2 inches above the water. The final flight time was only 11 minutes. I'm guessing it landed in the water from low battery? I had charged the battery two weeks ago, but didn't recharge it before this flight. I've only flown this drone 3 times prior to this flight and each time was a fresh charge. Lesson learned - and I didn't have a SD card in the controller. I was in 10 feet of water and could not see bottom. Even if I knew the coordinates, the current, the salt water, it would be pointless. I just bought a brand new battery I never even used and my go-pro was on board. Since we weren't looking when it landed, the search area was too large to dive for, especially with the currents off-shore it would be too dangerous. I thought I would post this in case there is a takeaway and also because I'm surprised I only got a 11 minute flight from a battery that was full two weeks ago. Has anyone else noticed such a short flight time from a two week old full charge?