this post was submitted on 28 Sep 2025
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[โ€“] Corkyskog@sh.itjust.works 15 points 3 days ago (16 children)

If I made a sci-fi game I would just make the currency MWh. They handwave away so much science, why not have a watch sized device that can store insane amounts of power?

Which makes me wonder, is there a physics limit to the density of energy? There has to be, anyone know what it's called?

[โ€“] tallricefarmer@sopuli.xyz 4 points 3 days ago* (last edited 3 days ago)

We have technological limits to the storage efficiencies of different types of batteries. Batteries defined as something that can store useable energy. If we are talking just energy, matter "stores" lots of energy, and you can look at the famous Einstein equation to play with numbers. I do know we have something like a matter density limit in black holes.

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