USB-C power bank for laptops

For those of us that have ultralight laptops with USB-C charging there has been a major gap in the power bank market: a power bank that can charge our laptops. There has been a number of vapor ware solutions touted, but now there is a commercially available alternative. Mophie has just launched the powerstation USB-C XXL, a 19,500mAh, USB-C PD 30W Fast Charge powerbank for sale in the US. Will eventually be available elsewhere, already in the Apple Stores. Currenlty promoted for Apple devices, will let you