If you spend a lot of time driving and have an iPhone, then you'll want a charger in your car. That way, you'll never run out of the juice you need for navigation, music streaming, and hands-free calling while you're on the road.
And if your iPhone is MagSafe compatible (which applies to all models from the 12 series upwards), you'll be tempted by the idea of a magnetic charger. Because quite frankly, it means you can just get in the car, pop your phone onto a magnet, and drive. Which is a lot more convenient than messing about with a bunch of wires.
