Power Bank,bestoss Ultra-thin 2000mah External Battery Power Bank,credit Card Size Portable Charger for Iphone 6s 6 5 Samsung Galaxy S6/s5/s4/s3 & Android (black) Card Size Ultra-Slim Design: Rated at 4.5mm depth, Bestoss Slim One 2000mAh is about the same thickness as your name card allowing easy purse stowage. Long Lifespan - polymer battery rated for 1000+ charging cycles for an ultra long lifespan. What you Get: Bestoss Slim One 2000mAh External Battery, Flat Micro USB cable, Carrying case, user manual, 18-MONTH warranty and 30-DAY money back guarantee. Built-in short-circuit and over-charge protection.Automatically turns OFF when device is fully charged. LED battery level indictor means you always know how much power is left inside.