In order to assemble that you need 3x18650 batteries and DIY PowerBank module from aliexpress: http://ali.pub/2tfbm6
SolidWorks assembly packaged and attached as zip.
PowerBank2-SolidWorks-Package.zip | 721.2KB | |
PowerBank2_-_PowerBank-Bottom-1.STL | 135.8KB | |
PowerBank2_-_PowerBank-Button-1.STL | 86.3KB | |
PowerBank2_-_PowerBank-Top-1.STL | 131.4KB |