10000mAh large-capacity power bank reduces charging time. The portable power bank port has fast output and input, and the USB-A port has a 22.5W fast charging output to save your charging time! The built-in AC wall plug allows you to charge directly from a wall outlet, and it is detachable and can be used alone as a fast charger for devices with cables. This black battery pack is designed with multiple output ports for wide compatibility with most smartphones and electronic devices. As a travel necessity, you can easily share power with friends. And it is equipped with a high-density battery with multiple built-in smart chips and sensors. It protects your device from over-discharge, over-charging, short circuit or overheating, etc. Yes, it is a travel necessity!