This "emergency power supply is very convenient. I use it when I am once more on the road and then the mobile use a lot. It can also charge my I-Pad. Of course must a be clear that this device only so long can charge the other device, until it itself has exactly the same capacity as the unit to be loaded. But I still have to give one star less because I had the impression that has been mine sold before. First, the product packaging was open and no longer packaged in their original. Secondly, there were problems with the first charging. The device has not apparently be fully charge. This was later correctly me. Conversely, I could my phone does not charge properly, because initially the power supply has shut down very early. I still do not know if I have more than once can load my phone. Nevertheless, this emergency power supply is well suited for use and does what it should.