OK, first got Phantom 2 Vision mid Nov. Flew just fine. Did 1.05 updates (drone and rc). It began to act differently, like as in getting invalid battery sign and abnormal communication with battery. But, when the klaxon sounded and it began to lower, I could still power it up and bring it back to a safe landing. Then, did the next update. Double checked. Good. All good. Tried to fly, but got erratic battery readings but could still safely land or fly but with caution. Then, today, took out to see if battery issues still there. Took off, hovered over soft area for a few minutes. Flew back and forth over soft ground. Then, decided to go to 30 feet and cross street. Right in the middle of the street the klaxon sounded and it began to lower. I gave more throttle and began to bring it back but the power cut totally out and it fell and hit the curb. Not good. Now I'll be sending it back to Heli-World. The problems of this invalid battery and abnormal communication with battery issues are, apparently, causing birds to fall out of the sky. This is a serious problem for the company. LOL, and for us, its customers.