[0xfae]

> batteries are incredibly inefficient compared to petrol

What are you getting on about? By what metric?

[SheepSlapper]

Weight, presumably, because that's the topic of the parent comment. Mile for mile, batteries are heavy and gasoline is (comparatively) light

[red369]

I assume they are referring to batteries having lower energy/power density, as opposed to the efficiency of the drivetrain

[rockemsockem]

Mass