Plug-in electric vehicles (PEVs) use electricity from the energy grid to charge large battery packs, then use the batteries to power an electric motor. They are primarily powered by electricity instead of liquid fuels and produce no tailpipe emissions. Plug-in vehicles can also generate power from regenerative braking systems, which convert kinetic energy from the vehicle's brakes into electricity that is stored in the battery pack. Since plug-in vehicles rely on rechargeable batteries for power, each vehicle has an electric range—the maximum number of miles it can travel on battery power before it needs to recharge. Applications for these vehicles go beyond just passenger cars (though U.S. consumer passenger PEVs are largely the focus of this fact sheet), as there are currently plug-in electric buses, utility trucks, high-performance vehicles, and motorcycles.