Is there anyone who's interested in Power bank? I have a connection with the factory in Shenzhen, China. There are many models like 4800 mAh, 7000mAh, 11200mAh, 13000mAh. They're greatly easy to use and inexpensive, only starting from $15 per piece. Half year guarantee. You got a problem with the product within half year, I'll replace it with a brand new one. PM me if you're interested, I'll show you the detail, you can get direct idea from the photos. They're STUNNING PS: Power bank is a small box filled in a battery with cable which you can recharge your phones and tablets while you're outside or anywhere.