About this 3D model

Here's a power bank design for a single 18650 cell Module from AliExpress: Type-C USB 5V 1A 2A Boost Converter Step-Up Power Module Mobile Power Bank Accessory with Protective LED Indicator and an 18650 holder: 10 pieces/5 pieces 3.6V Power Bank Case 1x 4.2V Battery Holder Storage Box Case 1 Slot Battery Container with Cable Print, solder, use some hot glue for the converter, assemble, add a screw, and you're done!