DIY Project: Solving the Xteink X4's missing backlight... 

Frustrated by the lack of a night light on the popular Xteink X4 e-reader, I took matters into my own hands. I designed the layout and 3D-printed this "case-in-case" prototype. It not only protects the device but also features a built-in LED light for late-night reading without disturbing anyone. Best part? The light module is completely detachable when not in use!