Car phone holder Charge Force Vent Mount by Mophie. This is the most common type of holder as it is supported by the car's air conditioning or heater. The device is mounted on the holder with magnet which you can attach either to your device or its case. It has wireless charging so that your device charges every time you place it on the base. It should be noted that in order for the device to charge wirelessly, it must also have wireless charging capability.