An earlier version of the related chart misstated the electricity-only range of the Toyota Prius. It is one mile, not 13. (A plug-in version, which is to go on sale next year, will have a 13-mile electric-only range.) The chart also referred imprecisely to the charging time of the Nissan Leaf. It is 8 hours with a 240-volt charger, and 21 hours with a 120-volt charger. Finally, the chart omitted the eligibility of two of the models for a tax credit; like the Chevrolet Volt, the Tesla Roadster and the Nissan Leaf are eligible for a $7,500 federal tax credit.