The first impression of the Power Bank is positive. The battery feels high-quality and is meticulously crafted - no unpleasant plastic smell. The Power Bank in black piano lacquer surface and attracts fingerprints.
The unit was summoned 75%. Thus, I could my Nexus 5 charge equal times and that was fast (at the output it has 2 A).
The Power Bank has four small blue LEDs (25% each step) on the top (on the side of the knob once short press). Many devices to find and very useful. During the charging or discharging of Astro is E1 not warm. The Power Bank is suitable therefore suitable for jackets of the size and weight for mobile operation.
There may be other devices such as MP3 player, tablet or the like can be charged via USB with the Power Bank. The Astro E1 is recommended in any case, because it is easy and convenient.