Got one myself.Mine works perfectly as a powerbank, but I think it needs 100 years in full daylight to charge my phone... a little.
I wonder why no one has made a powerbank like this with a integrated folding panel, actually capable of charging the powerbank. I have a pretty good folding panel that can easily charge a good 9600 mAh bank in a day during summer. In my limited experience, a good quality powerbank is also much better at charging from the folding solar panel. The cheap banks just wont charge 100% using the panel, but the good powerbanks will.
Yeah there is an LED light on this one as well. I doubt I will ever use it for much but I wonder if I had two of them, could I use one to charge the other by shining the LED on the other's panel? Def