When using a 45W pd3 charging brick with nothing usb c to usb c cable, the charging speed is not actually 45W. It charges at about 2800mAh, which leads to my phone charging in about 2 hours from 0 to full. Actually, when I plug in the cable for the first 2 minutes it charges at 5000+ mAh and then rapidly decays to 2800. Used multiple battery apps like Ampere to verify this.