I'm always looking for a charge cable for my smartphones.  For my Apple iPhone 5S, its something that I have to find and plug at least twice a day depending on the amount of usage I get.  Sometimes I forget my cable somewhere and then I have to limit the use of my smartphone till I'm sure I can get safely to a charger.

Things I use a lot which eat up a lot of energy are the GPS, camera, wifi tethering, and speakerphone - particularly in areas of poor cellular reception.  

So having a cable or means to charge regularly is a high priority for me, which is why I carry a variety of battery packs to go and a solar charger just in case in the car.  It's all fine until I forget my lightning cable.

Enter the Nomad Chargekey - its a tiny little dongle sized cable with all the right parts of the USB A port, and a licensed certified lightning head on the other side.  It fits on the keychain, and I love it - if anything for the assurance that I can always charge up and its always with me.