Follow-up to OP: If you do want that kind of large battery in a smartphone, you can get it. There are a few Chinese vendors that make “ruggedized” smartphones. For whatever reason, maybe because people want to be able to operate away from power, this class of device tends to have both a tough shell and large batteries; it was one of the few places I could find phones that had really huge batteries.
Follow-up to OP: If you do want that kind of large battery in a smartphone, you can get it. There are a few Chinese vendors that make “ruggedized” smartphones. For whatever reason, maybe because people want to be able to operate away from power, this class of device tends to have both a tough shell and large batteries; it was one of the few places I could find phones that had really huge batteries.
Doogee is one such manufacturer: here’s one with a 10800 mAh battery – I really wish that we’d use Wh ratings rather than mAh, but whatever – and another from the same manufacturer with a 22,000 mAh battery. These are also quite large.
For the former phone:
Or 0.87 lbs.
For the latter phone:
But that gives some idea of the kind of the size tradeoff that you might need.