Processing:
Processing has no defects and the material of the battery tray makes a very strong impression. The matte finish looks really good, but is prone to stains of greasy fingers;)
Capacity:
The stated capacity is true. Of course it's a little less than indicated as the charging circuitry also needs a little power. A scout camp where the phone had to serve as a camera, and an emergency mobile phone, as well as 2 days as a GPS, the battery has managed without any problems (duration of the camp: 10 days)
Accessories:
There are 2 cable supplied: 1x short USB -> Micro USB and 1x in just such a long time. The cables are ok and function, but sit a little slack in the MicroUSB jack my Nexus 5. As a comparison I had a cable from my old HTC and the included Google.
Weight:
Not necessarily very easy, but is in the capacity that probably clear to everyone who knows how to work the battery.
Conclusion:
Very good power bank at a reasonable price. I'd buy it again and would me again buy the batteries should be weak at times this power bank.