I think Razer accidentally made the perfect portable battery

Razer recently announced a new flagship laptop, the Razer Blade Stealth. It looks like a worthy successor to the old Razer Blade, one of the best Windows laptops out there, but the thing that really caught my attention is the battery pack Razer made for it.
A couple companies have taken stabs at making external battery packs for laptops before, most notably Dell with the XPS 13. They're not a bad idea, but since Amazon is already awash with cheap Anker packs, it takes something special to stand