An active car holder is a phone holder with built-in charging function. The integrated car charger supplies your phone with power via the 12V cigarette plug. This way, you always arrive at your destination with a full battery. Here, you'll find different phone holders with charging function. Is your smartphone wirelessly rechargeable? A phone holder with integrated wireless charger is a good option. Some holders are made for specific smartphones. First check whether your smartphone fits in the car holder.