1) Simultaneous charging of two devices is not working. After about 1 minute, the power bank will turn off. Only a single device will be accepted. - After the Power Bank is no longer to get going! (No function!) - Only when connecting it briefly again to a power source, it goes away.
2.) The Power Bank can not be fully charged. (Only about 20%), the indicator (LED) displays totally confused states of charge corresponding to the state of charge at all.
3.) Simultaneous charging the Power Bank and the connected equipment works schonmal garnicht!
Conclusion: Stay away!
In addition, one needs in addition to micro-USB cable is always a mini-USB cable to charge the Powerbak. Other Power benches to get there by the same cable that also need the smart phones. Here is not the case.
I'll try now with the almost cheap Anker Astro E5. ... Everything that is to be loaded without 220V power supply (for example to serve as a buffer for solar chargers), does not really seem to be bulging, for the price. ... The anchor E5 but seems to have at least one self nachkalibrierende battery indicator and can invite all devices at the same time, and by grinding power. Also I wrote a review about it.