My Phantom 2 has resorted to not giving a battery low level warning. It just gives a critical level warning and lands. This problem was not there originally, it appeared recently, possibly happened after software updates. It happens on both well used and new batteries. I am using the latest level firmware and software. There is one possibility that may be the problem. When using Phantom 2 Assistant either V3.6 or v3.8, in the battery window, the Battery Warning Threshold does not give options to set levels for low or critical levels. The only option is to tick a box at low level to go home, which I have selected. I have checked with a friend with the same model and his assistant software .gives options to set the voltage levels with indication of the suggested range for each. I am using the Naza-M mode. Has any else had this problem and does anyone have a solution, pleas?