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Comment by itronitron | Hacker News Reader

>> Apple has managed to pack the power of a Mac, plus the performance of a new dedicated AR chip, into a computer that you can wear on your face.

Regarding the external battery, I recall watching some movie where an AI discovered that the human body could be used as a battery. Seems like Apple could solve a lot of their battery issues by working on that.

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It will eventually come when machine eyes are better than human eyes. Replace the eyeballs with a processing unit connected to optics, use the body's energy through a connection to the eye stalk.

Marketing: Your vision will be much better, but the downside is that you're going to need to eat two pints of ice cream every day. Or if you want to lose weight, just eat one pint of ice cream every day.

Not sure a hand cranked VR goggle would be very popular. Or are you suggesting it should suck sugars from your bloodstream to power itself?

yes

Human needs 2000 kcal on average for daily activities, which is equivalent to 470 mAh. So... no.

I don't know how you did that math, but you cannot convert kcal to mAh, you need a unit of energy like watt hour

2000 kcal * 4184 (J/kcal) / 3600 (seconds) ~= 2324 Wh

which is... a lot of batteries (a large laptop battery is around 100 Wh)

A human at rest uses around 100W, which is easier to remember.

2.3kWh is about 10kg of battery (more if LFP, less if NMC).

2000 kcal is equivalent to 470 mAh at like 4946V.

This is not how unit conversions work.

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