Resembling a small child wearing an astronaut outfit with a backpack (for the battery power source), the ASIMO could walk on two feet at speeds at over three miles per hour.

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And when the battery charge runs low, the British supercar switches to an alternative power source, a pair of 77-pound micro-turbines that serve as onboard generators.

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Such solutions are clearly some way off commercial development, but with Apple rumored to be designing its hotly-anticipated iWatch around a power source based on kinetic and solar power, a battery-free world isn't such a distant dream.

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Even with all of the production tax credits, loan guarantees and a battery of other direct and indirect subsidies, nuclear power remains the most expensive source of conventional electricity on the grid once capital costs are plugged into the equation.

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The feature allows a fully depleted battery to be charged to 80 percent capacity in 30 minutes using a 480-volt power source.

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Via the integrated on-board charging componentry and the standard Porsche Universal Charger (AC), the battery can reach full charge within approximately two and a half hours when connected to a 240V power source.

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