Or alternately, you can use a lithium battery with air. But it gains more weight as it is used up. Anyway, energy density is comparable to gasoline. https://e

Or alternately, you can use a lithium battery with air. But it gains more weight as it is used up. Anyway, energy density is comparable to gasoline. https://en.wikipedia.org/wiki/Lithium%E2%80%93air_battery https://en.wikipedia.org/wiki/Lithium%E2%80%93air_battery