Summary

I needed to stop the battery cover from sliding off. Shortly after getting my Fire Stick 4K the cover failed. I found the Sleeve Revised model, but it wasn't good enough for my use. It had very sharp edges. I've softened those up. I've also scaled it in width and depth as to not require resizing when you are printing it. It's pretty snug. The easiest way to remove it is to use two fingers on the sides of the front of the remote and to push from the bottom with your thumb. I printed it with Glow in the Dark PLA, which is a very stubborn filament. I was able to print this without any supports on a Sovol SV08. I'm including the Blender source file so that you can adjust it to your liking as well :)