If you do not have USB port in your car, here is the solution. This dual USB car charger (2.1A), also sold through the Apple Store (but more expensive), you will quickly recharge your favorite smartphone while using it, such as GPS, thanks to a power issued 20W. Indeed, the basic 1A chargers only allow the load because they are not powerful enough to allow simultaneous (at least on an iPhone). It is also powerful enough to power one or even two iPad. It comes with a Lightning cable for your iPhone or iPad 5-6 2-3.