LAB.C Cable Case by Yougin Koh
Smartphone is an essential product in our life today. However, one inconvenient weakness is that the battery discharges so quickly. It is annoying to bring both a cable and an adapter.
An 8-pin USB cable is stored in a grooved part at the back of the case. So users can charge their mobile phone anywhere they get to an USB slot.
More about it: Behance