Jackery Inc through Amazon has the Jackery Supercharge 20000 PD USB-C 45W Power Bank for $49.99 (regularly $79.99) with Free Shipping for a limited time.
The Jackery Supercharge 20000 features USB-C 45W output that meets most USB C devices power requirement, especially for Nintendo Switch and most USB-C MacBooks. It has a 19200mAh battery capacity and a fast charge USB-A port in addition to the USB-C in/out port.