We have said it before, it makes no difference how cool, interesting or expensive your smartphone is when the battery alert comes on you might as well have an old classic Nokia 3310 in your hand becuase at least you make a call. However there are options available to travellers and commuters, like this Yubi wireless charging network. Simply subscribe to the service and charge your smartphone or tablet device in the SmartDock or from the micro USB port.
These docks will be available in a cab, on a train or bus, in a bar or restaurant and many other places. Once the Yubi charging device is established in your city or places that you visit, $50 will buy you three months worth of unlimited Yubi charging.
Source: Yubi Change