That suggests electricity will drive the wheels, and a small petrol, er, gasoline engine will recharge the lithium ion batteries as they approach depletion.

The gasoline engine exists only to recharge the lithium ion battery as it approaches depletion.

The engine's only job is to run the 53-kilowatt generator that charges the battery as it approaches depletion.

It's essentially a generator to charge the car's 16-kWh lithium-ion battery on the fly as it approaches depletion.

So, by degrees, the free-trader's stock approached depletion, until there remained no more than two good dog teams could haul.

E-Cell Plus - a range-extended electric vehicle that uses a small gasoline engine to recharge the battery as it approaches depletion.

The 1.4-liter gasoline engine drives a 53-kilowatt generator to keep the electric motor going as the battery approaches depletion.

The engine in VW's Twin Drive system actually drives the wheels, whereas the engine in the Volt only charges the battery as it approaches depletion.

Like the Volt, it will use electricity to drive the wheels and a small gasoline engine to recharge the lithium-ion battery as it approaches depletion.

A gasoline engine delivers the front wheels when needed (when the battery gets low) and helps recharge the battery pack as it approaches depletion.