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This table of energy density is really useful: https://en.wikipedia.org/wiki/Energy_density#Table_of_energy_content … How do you think oil or some other more energy dense fuel could be used to power electronic gadgets?
Great graph! Fun to think about where fission, fusion, and antimatter sit! The second was (mostly) a joke. Oil actually can (& does) power electricity, but I don't know what the energy efficiency is. Maybe quite a bit lower than we get from fat, but I really don't know.
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TBC: fats really do have higher energy density than lithium ion batteries. But that energy does have to be converted into a form the laptop can use, and so there will be some loss, maybe very substantial.
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