Baseus sells a few portable batteries in this slim form factor, including theBaseus Blade 100W.
Theproduct review atXDAmentioned it could charge an M2 MacBook Air by about 50% before running out of juice.
Baseus
Baseus
This New USB-C Battery Is Super Thin And Has An Info Screen
It can charge laptops, but don't expect it to last long doing that.
