Like recent offerings from Ford and others, the 2014 model adds a much larger 9.4 kWh battery to last year's non-plug-in hybrid, letting you trundle on electrons alone at up to 80MPH for 20 miles or so with with nary a puff of CO2.

ENGADGET

Not much, admittedly, when compared to the 128 watt-hours per kilogram of a lithium-ion battery, like that found in many electric cars.

ECONOMIST: Carbon-composite batteries

For longer battery life devices like iPhones, iPods or iPads, chargers are much less likely to be plugged into a gadget in a public setting.

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