For now, the Nissan Esflow is a concept, but Nissan is considering full production. It's not a stretch: The Esflow is based on the same batteries and motors that power the Leaf. The rear-drive Esflow carries a 975-pound, 36-kilowatt-hour lithium-ion battery pack, compared with the 24 kilowatt-hours found in the Leaf. To partially offset that extra weight, the concept uses a feathery carbon-composite body affixed to an aluminum chassis. Rear-mounted cameras replace side-view mirrors, reducing drag. Fixed seats sculpted into the bulkhead eliminate seat frames and the motors that adjust them. Likewise, the accelerator, brake pedals and shifter are electronic, eliminating the mechanical steering column and pedal assemblies.