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by jojobas 1249 days ago
Hydrogen by itself has the energy density of zero. Batteries are nearing the energy density of high explosives (and for some types, such as Li-S, exceed it), and, unlike hydrogen, have all the components required for energy yield within micrometers of each other.
1 comments

> Hydrogen by itself has the energy density of zero.

Not sure how you measure that? Oxygen from the air is plentiful.