I would like to power my Arduino Yun with an external battery or “Power Bank” as we in Germany call it. I have a battery at home with 6000mAh but because I of the good rating and the capacity of 25000mAh I bought a new one: Link to Amazon UK
The good thing with such power banks with USB: They should have already a 5 V output you need for the Arduino Yun. This is what I thought.
The thing is: With my old 6000mAh the Arduino Yun runs without any problems. But when I connect the new one I bought on Amazon then the Arduino Yun starts blinking the white USB-LED and WAN. What does that mean? Why is this external power bank not working but my old one is?
Does somebody know what I could do to get it work? Or what kind of external battery I have to buy to get the Arduino Yun working?
And I have one more question. The USB pins D+ / D- what are they for (see photo)? Can I also feed the 5V power into these pins? For example when I tune the USB-Cable like this: Link to Instructables
I am looking forward to getting some information