I just bought this, and the last image in the set is killing me because of how badly translated it is lol

If compact is what you’re going for, I use this one https://www.amazon.com/Samsung-Odyssey-Windows-Controllers-Accessories-Protective/dp/B07GLF8S36

Here's what it looks like with the Frankenquest inside ... https://imgur.com/a/aN0pW4O I have to tighten down the strap to get it in with the mounted battery but there's enough room. You also have to slightly deform the top of the case for it to fit right. In the pic where the case is closed you can see a lump on the left hand side. All I did was just push the concave portion with my hand to pop it up.

It’s a little snug but I use this one

https://www.amazon.com/Samsung-Odyssey-Windows-Controllers-Accessories-Protective/dp/B07GLF8S36