A 20-watt USB-C port with USB Power Delivery means the fastest possible charging for compatible smartphones and tablets – including charging an iPhone from 0-50% in just 30 minutes.* The additional 12-watt USB-A port charges a second device at the same time – another smartphone, a tablet, or any device that charges via USB-A. That means there are 32-watts of charging capability packed into a small, travel-friendly charger.