I had an issue with using generic usb chargers in my 12v socket for my jeep patriot where the iphone lightning cable would become hot and the chip would fry. Took a chance on this lenmar dual usb charger and so far so good
LENMAR Dual USB Car Charger with 4.2-Amp Output - Retail Packaging - Black Amazon Cell Phones Accessories
LENMAR Dual USB Car Charger with 4.2-Amp Output - Retail Packaging - Black Amazon Cell Phones Accessories