Anker PowerCore 13000 USB-C Compact 13000mAh 2-Port Ultra Portable Charger Power Bank for $27.99 Shipped

Anker PowerCore 13000 USB-C Compact 13000mAh 2-Port Ultra Portable Charger Power Bank for $27.99 shipped.  Here is a screenshot for reference.  According to the product description, it stores enough power to charge an iPhone 7 almost 5 times, a Galaxy S8 3 times or an iPad Air 2 times.  Note that it uses USB-C for charging the power bank and supports high-speed charging via PowerIQ.