That van's lithium-ion batteries offer the same amount of energy storage as the nickel-metal-hydride packs in the other version, but weigh half as much.

Each battery measures 40" by 36" by 18" and weighs 375 pounds.

Electric vehicles will not be feasible until a lighter battery is designed; currently, batteries equivalent to a 12-gallon tank of gasoline weigh 7,000 pounds, he said.

The batteries weigh about 1,100 pounds (500 kg).

The battery weighs 12 grams and provides 1000 mAh on low drain applications.

Although the Impact's batteries weigh nearly 900 pounds, the electric car has energy equivalent to only about 1.5 gallons of gas.

The batteries weigh 550 kg; their life is unknown.

The batteries, for instance, weigh only about one-fifteenth as much as those in a fully electric vehicle.

The batteries alone weigh 50kg (110lb), and will have to be transported across miles of snow and ice.

A lead-acid battery capable of yielding 1 kilowatt-hour of energy weighs about 60 pounds.