Just a Anker powerbank holder.
The inner dimentions are 7,5x2,2cm and 7cm deep.
There are two mounting holes on the back. Or stick it on the wall with double sidet tape.
I printed this one for the Anker Powercore Essential 20000 but maybe it fits also other powerbank, so please check the dimentions.
Enjoy
The author marked this model as their own original creation.