Energen Extreme 18000mAh Power Bank, Portable Battery Pack with USB 3.1A output for Tablet/iPad/Smartphone and USB Devices (18000mAh-Black) 18000mAh capacity, ideal for prolonged use during business trips, outdoor activities, or multimedia viewing. Dual USB charging ports. Charge multiple devices at once. One 2.1A ouput port, ideal for quickly charging tablets and other high power consumption devices. Allows the device to be in-use while actively charging. One 1.0A output port for smartphones and smaller devices. Built-in LED flashlight. Output: 1 x USB 5V/2.1A, 1 x USB 5V/1.0A. Input: 1 x mico USB 5V/1.5A