Patuoxun® multi-function car JumpStarter [Automotive] emergency power energy station 15000mAh Power Bank battery charger [12V / 5V / 19V, 2A / 3.5A] (Electronics)
The idea is certainly good, but when you move the device before the battery wobbles in the housing, and unfortunately there is a power outlet adapter, which you could charge in Germany. In China's work thus determined.