Uhm..
What?
Do you have anything to back that up? Just kind of sounds like you're needlessly hating based on everyone elses reaction.
What? How is it inefficient? The actual battery specs line up with it's size. You play a 3D game on an iPad pro and see how long it lasts.
Whoa, settle down folks.
The thing that jumps out most immediately to me at an architectural level is the fact that the battery is a single discrete component rather than a conglomerate of smaller modules that are more evenly dispersed for heat and balance reasons. Tablets today have followed that design paradigm for the better part of a decade and I'm confused why that isn't the case here for something that has that form factor. I'd like to see more of it before I say any more but that's my take from a distance. I can't really speak to the hardware specs themselves until more is known about them.