Better streamlining and smaller frontal area will help reduce battery requirements. But I don't see anyone headed anywhere near there yet. As a matter of fact, many of the new concepts are full size crossovers.
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The VW XL1 has a CdA 3.05 ft^2 and so could get by with half the battery and quick charge in half time.
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The streamlined electric motorcycles in Vetter competitions achieve 101 Wh/ mile, 336 mpgE, in real world runs with 55 mph average moving speeds.
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