In modern society, mobile phones play an indispensable role in people's lives. From the time we wake up in the morning to the time we order lunch, to the time we take the subway on our way home, we can't live without a mobile phone even for a second. Mobile phones are really important to us, and the durability of mobile phones is an important topic. Meanwhile, places now offer mobile charging devices that keep our phones 100% charged. However, we must ask ourselves: is this really good? Do we get anxious when we see our phones running low on battery? Will it affect our mood whilst bringing us high-speed efficiency? "Low-battery Anxiety" takes the elements of the charger and mobile charging sources and converts them into graphics. As the basic design element of font design, it tells people: do we really need so much power through the design of mobile phone cases and posters? Do we really need to stay connected to our phones for 24 hours?