Fast charging for iPhones is supported by the BOOST↑CHARGE USB-C car charger and USB-C to lightning cable. - This 18W car charger with USB-Power Delivery allows you to charge your iPhone battery from 0% to 50% in just 30 minutes, as well as other compatible devices, at the fastest possible rates. Start charging your iPhone right out of the box by using the USB-C to Lightning Cable that comes with it. To find out more about Fast Charge, read our online Resource Center's article on USB Power Delivery. Consult the USB-C Car Charger 18W compatibility list to see which Samsung, Google, and other devices are compatible with fast/optimal charging. * TINY BUT POWERFUL: - This small car charger, which is only 54 by, is made to be high wattage and to fit neatly on your dash.