With the development of technology, the popularity of social media, the significance of mobile phones in people's lives has become more and more important, but with the improvement of mobile phone performance, display and other technologies, the progress of batteries has slowed down, charging treasure, also exists with the market demand, so that the mobile phone always maintains sufficient power to continue the life of the digital electronic device, and relieves the trouble of the electronic product being out of power. However, what are the main needs of users when purchasing charging treasures? First, the functional requirements of charging treasures. The improved design of charging treasures is to combine the different power input and output, interface, The traditional one is usually one in two (micro-usb input, USB output 1A, 2A each)

Portability is a very important factor. It is only convenient to carry, its frequency of use will rise. Secondly, the input and output interfaces, Apple devices have a large number of users, and then the input interface of most charging treasures is micro-usb. With more than one charging cable to go out, there is less portability. In this project, my main focus is on graphic design and design psychology, focusing on guiding users to perform correct operations and improving user experience.