So you want to borrow some battery juice from your friends’ smartphones? The Zuo Charge S2 can help. It is a smart device that turns any smartphone into a power bank. You will be able to charge your portable gadgets using a Micro-USB OTG device. The cable also lets you move pictures, videos, and music.
S2 can charge iOS and Android devices. It comes in two colors. You can get it on Indiegogo.