See video below, to know how hybrid Car works.

A hybrid car refers to a vehicle that has two sources of power: gasoline and electricity. Today’s hybrids combine a gasoline engine with one or more electric motors (and a traction battery pack). In the automotive sense, this is a vehicle that has a gasoline-powered engine and an electric engine that work together to deliver better gas mileage, usually 40+ mpg. The batteries are recharged by systems like regenerative braking.

There are two batteries on hybrid vehicles, the traction battery and the auxiliary 12-volt battery, which powers accessories and the car’s computer.

Original article from articledashboard.com
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