So you want to use a friend’s smartphone to charge your own? The Zuo Charge S2 lets you do just that. It is a handy tool that turns smartphones into power banks for charging small gadgets. S2 lets you charge your gadgets using a Micro-USB OTG device. The cable also lets you move pictures, videos, and music.
This gadget is tiny and easy to use. You can use it to charge iOS and Android devices. The project is getting funded on Indiegogo.