PFU HHKB Professional HYBRID Type-S Cannot Be Charged via USB Type-C

The HHKB HYBRID Type-S can't be recharged over USB Type-C by design — swap the AA batteries.

Purchased PFU Keyboard HHKB Professional HYBRID Type-S English Layout / Charcoal

I picked up the PFU HHKB Professional HYBRID Type-S English layout (Charcoal) and paired it with multiple macOS machines.

Purchased 'HHKB Typing Bed PW-HHC-2'

A walkthrough of buying the HHKB Typing Bed PW-HHC-2 and the roughly four-month wait until it arrived.