Another victim of the dying ports?

I have the "Anker® 40W 5V / 8A 5-Port USB Travel Charger Adapter with PowerIQ technology" received yesterday and of course immediately tested. Phenomenon similar to already described several times. Just at the port one device loaded. Then drain and infected again: dead two ports in 12 hours..

Equipment:
- ASUS Google Nexus 7 (2013)
- Samsung Galaxy S3LTE

Cable:
- AmazonBasics USB 2.0 Cable A Male to Micro-B plug (1.8 meters)
- The supplied ribbon cable from my RAVPOWER Power Bank

All equipment and cables I work at the (too) many power supplies of up Noname brand goods properly since it had. There has never been any significant problems and then was poorly or not loaded because of a lousy cable. PSU is my last time a few years ago one got broken.

----- ----- Supplement 09.08.2014

The company Anker has already noticed several times by their truly sensational and above all active support. This time has to deal with an employee put me and me a replacement power supply and - if this should cause problems again - money offered back.

The replacement power supply has been there yesterday and was used overnight for parallel charging of five devices (S3, Nexus7, BT headset, BT speakers, battery lamp). The port on the headphones - thus the device with the smallest battery - loaded died overnight. Previously, I had but still determined by measuring that this is the only port was the less voltage supplied (4.86 volts) than the other four (6.5 to 12.5 volts).

I am quite ready to test a third power supply, but a lot of hope in the long feature I have not unfortunately. Very sad, but something is quite possible times. Bad was just a manufacturer of cross then turns and zickt. It is expressly not the case at anchor.

----- ----- Supplement 09.09.2014

Another port of the replacement power supply is gone. Stay three. I would like to know what it might be because the majority of the reviewers seem to be very satisfied. The purchase price was refunded to me now, so I've lost nothing. Besides the possibility to get anything here a few sockets free;)