no clean 5V to heavy, problems with Nokia

The Power Bank has plenty of power, the instructions say, of an actual capacity of 11000mAh (relative to 3.7V), which could get there in about because with a full charge can fully charge so some devices. Still, I can not quite make friends with the product.

First, the Bank does not provide clean power 5V, the voltage at the USB output has to refuse to charge at full charge the Power Bank 5.5V what Nokia phones eg prompted.
The slightly discharged Power Bank still delivers 5.2V what some devices causes problems, but better slightly more than too little.
You place the supplied plug adapters used an original Nokia USB charging cable, it will still work, they are apparently not only pure cable.
Nevertheless, the loading of mobile phones (Nokia E71) then an eternity lasts. After ~ 10 h the loading bar then shows an almost full battery, but 100% is never reached. Charging goes on forever and even though the Power Bank claims to give 1A per output and the original Nokia charger that to fully charge
Other units ran much trouble loading with the Power Bank, which included a Nikon camera, an Archos tablet and mp3 player. With a 5-inch Sony eBook readers, it has, for example but not back to work, this refuses to load at all, other than a PC.

For weight: The Power Bank for itself weighs 290g. The included plug set again 45g. The latter one is but so and so must leave home and replace it with functioning and heavier stock cable. So quite a brick, the part is already there to lug around on a journey. The metal housing that is safe for their part weight very stable and protects against mechanical influences. The device is neither sand nor water but firmly. After all, it has a Polysicherung against short circuits. With better quality batteries could have been but the 11000mAh can also loosely accomplish under 190g.

The Power Bank can charge devices while being charged themselves, but of course again a lot slower, depending on the USB charging adapter used. Such is übrigends not supplied.

Should display the charge indicator which 100-75%, 74-50%, 49-25% and 24-0% indicates rather 100-95%, 94-90%, 89-80%, 79-0% and is therefore only limited use.

Bottom line, the device good for the price, but my application is too heavy, too slow when loading equipment and load problematic when Haupteinsatzweck mobile and eBook readers.