Very good extent. Does my smartphone quickly and completely. Dimensions slightly smaller than my smartphone (ca.120x62x12 mm). However, the charge for two battery charges should-reaching it is with a little rest only. In some places, the Power Bank also quite warm, but not the capacity is detrimental (as far as I can tell). Download the bank either via included charging cable to the PC via USB or AC adapter smartphone on house current. 4 white LEDs that flash and burn one after another permanently. All 4 by combustion bank fully charged. Turn phone battery and USB charging cable Shop- page insert in the bank. With a small button on the LED side you can press the current charge status query (when disconnected from the power). The respective LEDs will light up for about 5 sec.