If you load the Power Bank, flashes a red light to control during charging. Is it full, then the light will turn blue. The small Power Bank has enough juice to charge a smart phone. Then it has to the charging station itself again. That's enough but out completely.
The Power Bank is a light blue protective strip, which can open up on the narrow side. Among the micro-USB port is hidden output for charging the device. An adapter for the iPhone is. The one can simply push and so the tiny does not fall during transport accidentally from his pocket.
Good idea and compact solution.