The SpareOne first made its debut at CES 2012 with gutsy claims of a jaw droppingly amazing battery life that can last up to 15 years. Years! SpareOne is an emergency mobile phone that is powered on by a single AA battery for true emergency back-up. And as far as we know it, the SpareOne is the first and only of its kind to run off of a single AA battery. The point SpareOne makes is that you'll never have to plug it into a power outlet as its solely battery depended. The phone is made by a company called Tennrich which is behind the XPAL power technology featured in the SpareOne, and the impressive power performing PowerSkin smartphone battery cases. Find our more after the break!