How do you charge the remote for a tv4k ?

See the following excerpt from an Apple Support article Charge the Siri Remote - Apple Support

1. Connect one end of a USB-C cable (sold separately) to the port on the bottom of the Siri Remote.
2. Connect the other end of the cable to a computer USB-C port or to an Apple USB-C power adapter (sold separately).
3. The Siri Remote takes about three hours to fully charge.