Had a fly away today...the drone went 1500 feet away at an altitude of 250 feet and had no issues and got some good footage with no loss of signal. I returned the drone to home and it returned and landed successfully. I then took off again and went to and altitude of 350 feet and moved 25 feet from where I took off and hovered. I noticed my battery was at 25% by that time and I hit return to home. The drone proceeded to climb to 400 feet and became unresponsive then started to move away from the home location. I was roughly 3000 feet away from the ocean and the drone was going that way. I lost signal with the drone at 9% battery life. I searched the area, notified law enforcement in case any one called it in but no luck have yet to find it and have come to the conclusion based off it's ascend and speed it possible made it to the water and plummeted into the bay. So now I'm out a go pro, drone, gimbal and battery.