Okay we all love a little fun in our tech and the Dexim Visible Green Cable For Micro USB Devices from Mobilefun will do just that embedded in the charging cable are a series of blue lights which “flow” from the power socket to your phone, letting you know it’s being charged it also adjusts to the charging rate, so when it’s charging at the full the lights flow quickly, and when the device reaches 65% the lights slow as the charging slows and allows you to tell roughly how much power your phone has. The lights used in the cable are specially designed and features EL technology which works using the least amount of power  which means that despite the added functionality of being able to see when your phone is in the process of charging at a glance, the speed at which your phone charges will not be affected. Of course this  cable was specifically for Micro USB devices, meaning you can be confident of compatibility with your device. It features a standard Micro USB connector, compatible with any Micro USB device. Now overall I love how Dexim has kept green and still made a fun like cable yes I have ditched my regular old cable for my Kindle and moved onto this cable it also helps with charging other devices like MP3 Players and non apple phones I hope dexim does come out with other colors besides blue and then they might really have something very unique to bring to market here this cable would  go great with your new S4 along with some other cool S4 Accessories