I kind of doubt their numbers as well, but 28000 MAh is quite a lot. I go through about 2200MAh a day ony my phone (which is a few years old now, so less efficient, also the battery is clearly on its last legs), I would get almost two weeks of browsing and video playback out of this brick.

Fkr certain (business) use cases this could actually be a pretty neat device, especially for the price they’re asking.