At an AC charging station, AC power in the grid is provided to this onboard charger, which converts it into DC power to recharge the battery. DC chargers supply higher power charging (which requires much greater AC-to-DC converters) by constructing the converter in the charging station instead of the vehicle https://cheapest-storage11100.pointblog.net/an-unbiased-view-of-cigarette-lighter-usb-car-charger-76312050