As a motorsport fan I am often on the road race. Far away from irgenteiner outlet to my phone to reload. This can be particularly frustrating if one "Live Timing" Apps used to see the positions of the vehicles, because these apps are true battery eater. In the course of the last 24 race I bought this Power Bank. And what can I say? Two days served as my battery charger for mobile phones and 3 for the GoPro a friend. Since the device is at every race in his luggage and had previously never even irgentwelche problems with loading a mobile device or charging the Power Bank itself.