Generic Fast Charging 20000mah 2V 1V Double Usb External Battery Backup power bank for Mobile Phone, iPhone, iPad(Black) Powerful 20000mAh external mobile battery charger keeps your digital devices always powered Quickly and effectively solves the low power problem for your devices while on-the-go Designed with a 5V 1A and a 5V 2A output USB port, universal fits for iPhone, iPod, Samsung devices, cell phones, tablet PC, etc Super protection: overshoot, over-discharge, short circuit, over voltage, leakage, and many other protective functions Smart power bank suitable to be gift