[Steely Tom]

The best energy density of a conventional lithium-ion battery is somewhere around 2 MJ/L (megajoules per liter). If we believe the information given in this article, that means that Samsung's new batteries are around 3.6 MJ/L, at least when they're brand new.

For comparison, the energy density of gasoline is around 32 MJ/L, which is not quite nine times as much.

Of course, to turn gasoline into electricity requires heavy, bulky, noisy rotating equipment that weighs a lot, is dirty, vibrates, and ejects red-hot poison gas. A battery requires none of that.

Energy density info source.

[Red Badger]

Of course, to turn gasoline into electricity requires heavy, bulky, noisy rotating equipment that weighs a lot, is dirty, vibrates, and ejects red-hot poison gas. A battery requires none of that.