Probably just a power source and no charger

As you can see from the picture set of me, it seems to have probably been a design change for the same item number and description. I invite the thing my navigator, and works beautifully (and silent). However, the Navi has its own charge controller and requires only a 5V power supply.

In the following I would like to comment briefly on the issues that are reported to this device and its white variant:
According to the product description and due to the low weight and the low price, I suspect that the device simply provides a stabilized 5V DC voltage is available and can be loaded up to 1000 mA. Thus, the term "charger" is misleading, it is actually then to an AC adapter. The USB socket on a computer does on the contacts of 0V and 5V otherwise. However, a USB socket has more contacts and also does not mean that all equipment manufacturers, which are provided with a USB connector, stick to the standard. Thus, two types of problem cases are for devices that do not have their own charging scheme possible:
1. The manufacturer of a terminal provides its own charger with charging electronics and abused the contacts for 0V and 5V. In such a case it would not be surprising that the terminal will be damaged by 5V, the permanent concern in the event of a mains adapter. However, the same would also happen if the terminal would be connected to the USB port of a computer.
2. The manufacturer of a terminal shifts the load control via (driver) software in the computer supplied. Then it is obvious that for charging other contacts of the USB port used, and consequently when using a 5V power source, which only supplies the contacts 0V and 5V, nothing happens, ie the terminal battery is not charging. Here, the terminal can be loaded only on computers on which the load driver is installed.
General recommendation: If you connect a power supply to the mains or disconnect from the network, it is possible that there is a voltage spike at the output, which can damage the device. Therefore Always plug the power adapter into the power outlet and then connect the terminal and vice versa: first disconnect the device from the power supply and then aussstecken the AC adapter.