»Lithium-ion battery
~ considered to be critical in developing future electric, hybrid and other ecological vehicles
~ smaller and yet more powerful than the nickel-metal hydride batteries
~ under the hood a hybrid car may also has a regular battery, which is used to start the engine
~ when the car idles, as when the driver shifts to neutral or parks at a stoplight,
~ the engine stops automatically without the driver having to switch off the ignition as in a regular car
~ that helps save on gas
~ the engine restarts — powered by the lithium-ion battery — when the driver's foot is lifted from the brake pedal