the only 'minor' detail not mentioned is that it runs for... 30 minutes. And then it shuts down. But why oh why?! Well, the smaller the overall surface, the harder to dispose of heat, the harder to dispose of heat, the faster it heats up, the faster it heats up the faster it shuts down, otherwise it would melt and smoulder and Anker can not risk that happening to their brand (imagine this at an airport departure lounge).
Small is beautiful. For around 30 min. Perhaps they should add a 'free' ice cooler box?