Mophie's Juice Pack Powerstation Mini External Battery is like a lifeboat for your phone, but smaller, much smaller. Charge it whenever you charge your phone and you'll always have a lifesaver ready at hand, a battery life saver, that is. This lightweight, compact fellow fits snugly in your pocket, purse, backpack, or suitcase throughout your day just waiting for rescue duty. When your smartphone or any other USB charging device starts losing hope, just plug in the Powerstation and watch it charge twice as fast as regular USB batteries. Its smooth outer finish and stylishly protective outer band will last for many rescues to come.