Excellent design / full charge limited to 1 unit.

To begin, I take a star for the excessive price of 5 euros in my opinion. But otherwise it has advantages that may justify a rate of about thirty euros.
First of all the design of excellent craftsmanship. It is rather light and reasonable size for a charger to IP 67. On one slice, it has the rubber cover that seals it and lets his / off without having to remove it. The outline is also protected by the same rubber material that inspires confidence.
It comes with a convenient soft case that can store it with its micro USB cable (included as well).
It comes ready to use, the copy I received was charged to 75% capacity, which is enough.
I did a full charge and I used it on a samsung s4, an iPad 2 and a Tom Tom GPS.
To begin with it should be noted that the charger comes with a clear indication of its capabilities, namely that performs charging a phone up to 100% ... which means that the load capacity varies the phone.
In fact, more precisely, the charging capacity of your phone actually depends on the state of your phone during charging. If you're using it while browsing the internet, or on an application that requires the constant lighting of the screen for a long time, so do not expect a 100% charge. BUT: this detail is also present in any charger you buy, even those large capacity: from the moment you load an operating rather than standby mode, regardless of the capacity of the charger, it recharge fewer devices.
As for the sleep mode, I was able to load without problems my S4. Vacuum and off, I loaded my gps Tom Tom. In my Ipad 2 in sleep was also charged to 100%. Once you use one of its aircraft outside the standby or off mode, the load to 100% can not be guaranteed.
That being unique to most chargers, this Varta provided for a charge seems very reliable and efficient.
On the top are 4 blue LEDs indicate charging status. To turn off / on, is pressed for 2 seconds the button.
The lid is removed well below one obviously is the 2 USB ports, one with standard A to load, the second micro USB to be loaded, and easily accessed button between the two.
According to the connected device, the charger will start automatically, or it will make the pressure 2 seconds.