Power banks come handy when you are travelling and you need to juice up your phone, earphones, and tablets. Here are a few 20,000mAh or larger power banks you might want to purchase.
The Mi Power Bank 3i comes with dual input ports: a Micro-USB and a USB Type-C. There is smart charging feature, and it offers 18W fast charging. The smart power management feature allows users to safely charge low power devices such as Bluetooth headsets, Fitness bands by double pressing the power button to enter 2-hour low power charging mode.