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A comment on Smartphone sales fall for the first time, says Gartner. Parent comment

Re:Smartphone sales fall for the first time, says Gartner by davidgay on Wednesday February 28, 2018 @12:25AM (#16480877)
> In Energy and Civilization, Vaclav Smil points out that in terms of embedded energy, an automobile, with over 1,000x the mass of a smartphone, has only 100x the embedded energy.

Assuming embedded energy means "battery / fuel capacity" this seems very wrong:

- typical compact car (~3000 lbs, ~1360kg) / Samsung S8 (155g) = 8800

- 50L fuel tank = 475000 Wh / Samsung S8 battery 11.55Wh = 41000

So that's ~4.6x more stored energy per kg, not 10x less.

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Re:Smartphone sales fall for the first time, says Gartner by holri on Wednesday February 28, 2018 @12:49AM (#16480982)
I think he means gray energy https://en.wikipedia.org/wiki/Embodied_energy
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Re:Smartphone sales fall for the first time, says Gartner by dredmorbius on Wednesday February 28, 2018 @04:04AM (#16481707)
"Embedded energy" is the total energy of manufacturing and processing, not the energy storage of a device or vehicle itself. On that basis, the automobile has many, many, many times the storage of a cellphone.

https://en.wikipedia.org/wiki/Embodied_energy

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