Just a quick modification to allow quicker printing and save on material. I will be using this for my steamdeck as a backup battery and it will be attached via DeckMate.
If I printed again I would print the DeckMate part already attached.
This is not my design, I have amalgamated multiple designs from the internet.
https://www.printables.com/model/542827-anker-737-case
https://www.printables.com/model/289610-steam-deckmate-top-higher-tollerance-mechanism
https://www.printables.com/model/281091-no-screw-kickstand-base-for-deckmate
https://www.printables.com/model/325627-alternative-mounts-for-deckmate-now-with-angles
TPU Springs
https://www.printables.com/model/350324-steam-deckmate-printable-springs
The author remixed this model.
I have added some 45° slabs to all the corners to allow printing without supports. I also added a slab to allow attaching something like DeckMate or KillSwitch. This is not in any way perfect and is just a test.