The wires you'd find inside a regular USB cable are usually standard-sized 28 guage wires while fast charging cables have bigger/thicker 24 guage wires which allows for more current to be supplied to a battery of the same

Ugreen nickel plated Type-C to Type-A cable provides connectivity from a USB C tablet or smartphone to a host computer, laptop, wall charger or external battery power bank with USB A port for charging and data transfer. Connect USB Type-C enabled devices (MacBook, Chromebook Pixel, Galaxy Note 7 etc.) with standard USB Type-A enabled devices (laptops, hard drives, power banks, wall/car chargers etc.) using the UGREEN USB Type-C to USB Type-A 2.0 Male Cable. Available in black or white and in various lengths, the high-quality data cable ensures easy connections and reliable performance. Fast Charging and Syncing The cable supports up to 3 Amps of power output for powering and fast charging of phones and tablets equipped with a USB Type-C port. For backup charging, it can be used in conjunction with any USB Type-A phone charger, portable charger, or multi-port USB charger to charge a laptop or other USB Type-C enabled devices. It can also quickly transfer music, photos and data to and from a laptop with transfer speeds up to 480 Mbps. Reversible USB Type-C Connector The cable’s USB Type-C connector offers a user-friendly reversible design that makes it possible to easily connect the cable to a device. No more wondering which way faces up when plugging it in. Type-C connector is half the width and one-third the height of a standard USB-A connector and only slightly larger than Lightning or Micro-A USB connectors.