For some reason I am getting a "battery installation error message" on my cell phone display when I make a landing. Then I receive a message that I cannot take off due to a battery installation problem. I shut off the power to the drone and I check to make sure that the battery is properly seated inside the drone. There appears to be no problem with the installation of the battery. I am now able to take off again but when I come in for a landing again I receive the message "Battery installation error message" I keep getting this same message with all three of my batteries. I don't want to fly if I keep getting this message.. I also notice that on an occasional basis the controller beeps at me with no message on the cell phone screen when I am about 200 feet in the air and flying at the normal speed position. Any ideas as to why I am getting this battery installation message when there appears to be nothing wrong with the way the battery is seated inside the drone. Any comment would be appreciated Thanks Mr Mint