Very small and flat, this very useful part is always at hand. Recharging the Power Bank takes so about 2 hours, then signaled the extinct indicator light that the charging is completed; the power bank is charging the way to the charger of your smartphone.
To charge the smartphone now these charged PowerBank like a normal charger to the phone is connected. Depending on the charge state of the smartphone Recharging takes now more or less long, just like the "normal" charging at the power socket.
Since the function is basically self-explanatory, the lack of guidance from nothing, information about charging times would have been helpful, however, to start.
Five stars for this useful part!