I have a electric plane and after i charged the batts I did a test run. It ran good at full for a while than it just shut off. I could go all the way off than back on but only to 3/4 power than the same thing but this time i could only go to half power. finaly it would pertty much stop all the way.Is this how it should be?? I also noticed that the batt for the motor also ran the reciver even after the motor stoped . It is not a gluider do i even need the battery pack for the receiver in the plane?? Or is this how it should be. Thanks Green thumbs