I've been using this case for about a year now, It holds up really well.
This case is made out of two parts :
One is the main TPU case (the black part)
One is the PLA filler (In purple)
I advise printing it with :
automatics TREE support + Only Touch Build Plate option
+ I have also attached the STEP file from the Replica that I made of this battery it you want to use it for your design
The author marked this model as their own original creation.