I started Anafi with the just the controller, no phone, and lifted off for a hover at about 4’ elevation (1.25 meters). I was going to time the flight to see how much time the second battery might provide, if any.
I was careful not to cover the fan outlet or sensor on the underbelly with tape. Unfortunately approaching the one minute mark Anafi started darting left and right and losing all flight composure, so I went to ground.
I am not sure if the load was out of balance, poor center of gravity, and the drone became overwhelmed trying to remain stable, or of the fact that I was not using my phone connected to the controller had anything to do with it. I was using the phone to take photos and time the flight.
It is also possible that the forward part of the second battery, was blocking the GPS receiver inside the drone, thereby
interfering with it’s ability to maintain position. I mounted it forward a bit
trying to keep the airframe more or less balanced.