IBM Battery 500: A look inside a lithium-air battery

In 2009, IBM researchers set out to develop lithium-air battery technology capable of powering a family-sized electric car for approximately 500 miles (800 km) on a single charge. Instead of using heavy metal oxides, lithium-air batteries borrow oxygen from the air as the vehicle is being driven, creating an air-breathing battery. This results in lighter batteries with high energy density that extend the car's range from a single charge.