Yeah, most batteries have to carry their own oxidizer, so I guess this would be a more fair comparison. I guess that's an advantage of an air breathing engine/m

Yeah, most batteries have to carry their own oxidizer, so I guess this would be a more fair comparison. I guess that's an advantage of an air breathing engine/motor. However there are air breathing batteries. https://en.wikipedia.org/wiki/Aluminium%E2%80%93air_battery https://en.wikipedia.org/wiki/Aluminium%E2%80%93air_battery