Some of the first pacemakers used radioactive batteries. We left that concept pretty fast. And that is considering you have to cut your patient open to change a pacemaker battery. This will not happen in commercial cellphones

Probably too much LTT. Also considering the ankommt of power that would draw, even if basically idling

I don’t know if they actually care, but I think they figured privacy was a great niche to jump in when they started losing more and more market share to android