When the world gets smart, lithium-ion batteries are key

The world’s leading electric car manufacturer has introduced a lithium-metal-air battery that it says will be the “world’s most energy-efficient.”The lithium-air batteries will provide more energy per kilowatt-hour than the existing lithium-polymer battery, but are lighter and cost more.Tesla said the batteries could go on sale by the end of 2018.Tesla has been working on […]