I think it’s accurate to say that meat is a luxury in the sense that we collectively are paying environmental and ethical costs for the farming industry.
I'd like to see us factor in the bio-availability of nutrients from both plant and animal sources when considering the costs, as well.

You'll find that based on 3.7 - 4.2 that most li-ion batteries are indeed charged from 0-100 and not 20-80 as you previously claimed. Manufacturers have no reason to overprovision consumer products that are made to be replaced in 5 years or so.