As with Simubat 4.0 Gen 1, the VR user is immersed in a battery production pilot line. He/she has to learn about the formulation and electrochemical properties of the battery cell to be manufactured. The user starts by manufacturing each electrode and then assembles them to form a cell. At the end of the calendering step, when an electrode is manufactured, a QR code is automatically printed. Thanks to the MR, the second user can scan this QR code with the HoloLens 2 headset to manipulate the 3D holographic microstructure of the virtually manufactured electrode (Figure ). This tool could be particularly useful for users to explore and practice on a production line, something that is often difficult to achieve in traditional practical work.