This will hold your E010 quadcopter, transmitter, spare batteries, charger, and some spare props.
The lid is held on by a pair of 10mm x 6mm cylinder magnets, one in the lid and one in the box itself. They grab each other very securely, and it takes some effort to get the lid off, so it should not come off unintentionally.
There are places for 6 batteries, stock or slightly longer, and a larger open area in front of the quad for props, charger, and any other small items you might want to carry.
Update Oct 15, 2016
I tweaked the design to maximize the free space up front. It is now big enough to easily hold one of those 5-way chargers that banggood sells with the spare batteries, like you see in one of my photos with the green box.
I printed at 0.3 layer height and 20% infill to speed up printing. I'm printing several of these and wanted it to go faster. You could use a higher resolution, but it isn't really necessary, and it would have taken several more hours at a 0.2 layer height. A higher infill might look better if you are printing it with a translucent filament, like the red box in my photos, but it will also take longer, and 20% is plenty strong enough. The green box was also printed at 20, and is fresh off the printer, with no cleanup. The green lid was still printing, so it isn't in the photos.