I have a quadcopter x with kk flight controller controlled by flysky ct6B recently I was flying it but after some decent use I observed that during flight one of my arm or motor stops in mid air just like it is not getting enough voltage but when I check through voltmeter the voltage is 11.1v
My battery is bit old and suffered a lots of crash but is not puffed nor damaged.
And when quad crashes the motor which stopped in mid air (2nd) starts to beep again and and its ready for flight.
Any help guys???