Anker PowerCore 20K Power Bank with Portable Fast Charging 20,000mAh with Black USB-C and USB-A Output: The item Broad Compatibility Almost any mobile device can now be charged thanks to support for both Power Delivery and Quick Charge technologies. Amazingly Transportable It would be difficult to locate another portable charger with a 20,000mAh capacity that is so small and lightweight. USB-C Connectivity