After a crash, the rear CCW motor stopped working. I ordered a set of RCGEEK motors. I replaced the bad motor, with the new CCW motor. I did not run the wires to the mother board. I cut the wires from the mother board, in the middle of the motor arm (strut?), then cut and soldered the wires from the new motor. The tello took off and seemed to fly fine. But now, the battery dropped from 98% to about 60% in about a minute. Then down to 10% in about 6 more minutes.Total time was about 7 minutes. It used to fly for about 11-12 minutes.I also noticed that the Tello was bobbing up and down while hovering and it also slowly yawed to the right about 90 deg during that time. Neither one of these happened before. The new motor was also a lot hotter than the original 3. I tried replacing the motor with the other new CCW one, replaced all 4 props with new Tello props, installed a fully charged battery and did IMU and gravity cals, same issues. Could the problems be caused by soldering the wires? Any ideas or suggestions? Thanks.