The F11 is a common beginner drone that has had many updates and versions while the basic airframe remains the same. There are not many accessories available for this drone and not many 3D designed & printed items either. That caused me to design a few things for my own use, which I am sharing here. The travel case the F11 comes in has a hollow that is oddly shaped, but can hold extra batteries. This tray is designed to fit into the oddly shaped hole and provide two slots for extra battery storage.
Download from thingiverse