Havit PB8809 20000mAh Power Bank is built in 20000mAh with 20000mAh/3.7V/74Wh capacity. This power bank consists of Micro USB DC5V/2A input, DC5V/1A/2.1A output, and Type C DC5V/2A with two USB ports to connect devices such as smartphones and other devices that charge via USB. This power bank has at the top 4 blue lights to indicate the percentages of the battery. Small and light in size, it is very convenient to transport.