Why not buy from China
I think you cannot deny all the suppliers from China, though in fact mostly of them with bad quality and cheap price.
Last week, I bought one from vivi power bank in the gift show in Las Vegas, vivi is their logo and the one bought is leaf power bank, with 5000mah battery. After I bought it, it is working well, at least till now there is no any question.
With a high-tech idea, this product not only very slim, but also itself with micro usb wire, in this case, it quite prefect for my samsung galaxy.
When i am in Las vergas, it help me much without a heavy and big stuff, but enough for me.
Hey, guy, maybe you can try them too, to change some extreme thoughts, sometimes we still need to learn from others based on their advantages. right?