Square magnetic charging treasure three-dimensional design a lightweight portable energy storage device modeling attempt. The basic rounded corners are used to weaken the cold feeling of digital products, and the low saturation light blue is used to create a soft visual atmosphere. The concentric circle layered magnetic structure is used as the visual core, and the metal texture increases the level of detail, distinguishing functional areas and strengthening product identification at the same time. Double size iteration, balance portability and battery capacity requirements, the overall shape without redundant decoration, the pursuit of less is more practical aesthetics. A full set of self-built model pure white scene rendering, recording a complete digital accessories design process.