Moto Z Battery Beast
 

Suffering from battery anxiety sucks, so I recently went on a crusade to find the flagship smartphone with the best battery life. Like most phones the Moto Z's battery is non-removable, but you can magnetically attach a battery mod to the rear of the device that provides a significant stamina boost. Moto Mods are simple and sleek. The results are great, too.

http://www.techspot.com/article/1315...battery-beast/