Mobile phone battery testing production line (Polygon mesh 3D model) is available on CGTrader for $10. Original author: jaketnet2012.
JPG (JPG, filesize: 24.5 MB), PNG (PNG, filesize: 24.5 MB), MAX (Autodesk 3ds Max, filesize: 24.5 MB), SLDPRT (SolidWorks, filesize: 24.5 MB)