Ambrane Power Bank P-20080is a powerful 'DOUBLE OUTPUT'powerhouse with inbuilt lithium ioncells having a battery capacity of 16000 mAhthat can charge almost all your smart devices. This 16000mAh Power House by Ambrane will never let you down even when you are travelling long distances without any stable source of electricity at hand. Be it a road trip or backpacking, you will never have to worry about the battery in your phone or any other smart device you have. it has double output - Standard USB-A connectorInput: 5V /2.1A, Output-1 - 5V/2 A; Output- 2 - 5V/1AThe battery charging time is overnight and a battery cycle life of over 500 times. It's a high efficiency, widely compatible device that saves electricity and is protected against over current, over heat and over voltage. It can charge regular smart phones more than 8-10 times.