When the Phantom Vision was released I remember seeing posts about Phantoms that had dropped dead from the air down to the ground. Many people said that it had something to do with the battery or the battery connector. Dont know if the earliest firmwares had a logic of turning the engines off if it had any problems (bad connection for a certain amount of milliseconds, voltage changes etc.). Because the later firmware updates made your smartphone to receive battery failure type of notification asking you to land immediately, which might tell about change in the logic/behavior that Naza had if battery failure (voltage etc.) had occured. The question is: -Has your Phantom 2 (or vision) or someone that you know dropped dead because of the battery? -Are you aware of the error message that you might receive with Vision? -If you are aware of the problem exisiting, do you know what has been done? -What are your overall experiences of the P2(vision) battery?