So i bought a USB Powerbank with 2 USB Poweroutputs to deliver enough power for the raspberry pi and my touchscreen. Both work on 5V.
I bought following powerbank from ebay for 15 EUR :
http://www.ebay.de/itm/110989165547
Some technical data:
- Output Capacity : 18.5Wh ( 5000mAh ).
- USB Port 1 : 5V, 1A.
- USB Port 2 : 5V, 500mA .
- charging time ca. 8,5 hours
- Input: DC5V 500mA
- max Output : 1.5A .
- 110 * 70 * 16mm
- 145g
And here is a short video on youtube:
