The Power Bank can be a Nexus 5 about 2 1/2 to 3 times full load. A tablet with over 3, 000 mAh, it can take up to 2 times full load. For a weekend camping trip so it's great. Who more than 6 or 7 days are traveling without fixed power supply, should think a stronger (or other technically) alternative.
Processing acts dibasic. It creaks and rattles nothing to the equipment and it gives the impression as if it abkönnte a few gentle kicks in his pocket. Larger falls or violence, however, I would not want to try. Water resistance and increased resistance to dirt I would not insinuate, even if the design is reminiscent of other outdoor equipment. Therefore, one should not leave the unit necessarily fall into water or mud.
The charging time can be varied. Devices that tolerate an input of 2.1A, can look at the quick charging socket (marked with 2 flashes) are plugged. All others should be plugged into the socket 1.0A (1 flash). So you can get a Nexus 5 (Battery 2300 mAh, off) in just under 2 hours from 0 to 100% charge.
So far I have found no negative traits.
All in all a good and handy device that I have in my messenger bag almost always with me.