1.  Researchers say that they have devised an efficient methane-powered electric battery.

2.  Unlike other alternative fuels, such as natural gas or electric batteries, biodiesel requires only minor mechanical modifications.

3.  Using the model, McFadden has estimated, for example, what would prompt people to shift to cars powered by electric batteries rather than gasoline.

4.  Another Soviet sub was shelled by a U.S. anti-submarine aircraft when it surfaced to refill its electric batteries.

5.  Bai said the more people who practice together, the greater the energy they create, like putting electric batteries in a row.

6.  When the car is on, an arrow flickers from the battery to the motor to the tire, signifying that power is coming from the electric battery.

7.  Above that the petrol engine takes over, at the same time charging the electric batteries.

8.  An electric battery was a component of the device which blew up in the Paris metro last week killing seven people, informed sources said Thursday.