Hybrid Electric Vehicles
Hybrid electric vehicles (HEVs) are powered by two energy sources-an energy conversion unit (such as a combustion engine or fuel cell) and an energy storage device (such as batteries or ultracapacitors). The energy conversion unit may be powered by gasoline, methanol, compressed natural gas, hydrogen, or other alternative fuels. Hybrid electric vehicles have the potential to be two to three times more fuel-efficient than conventional vehicles.
Unlike like electric vehicles, the batteries in HEVs don't need to be plugged into recharge. Instead, they are recharged using regenerative braking. This means the battery is charged whenever the brakes are used. Read more...
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