This is a case for a cheap USB charger-board (link below) and two cells out of a dell laptop battery for a Latitude 7420 or similar.
The cells should be around 4000 mAh new, and from the “dead” battery that I pulled them from, 3 of 4 still had about 3000 mAh of capacity left.
The cells are 4.8mm x 57mm x 79mm hence part of their name: *485779*
I uploaded the IPT and STEP files as well if you want to modify the model.
As this is just a cheap powerbank, I chose to just superglue all plastic parts together.
https://de.aliexpress.com/item/1005006000258125.html?spm=a2g0o.o
The author marked this model as their own original creation.