I’d like to share that the PFU HHKB Professional HYBRID Type-S cannot be charged via USB Type-C.

Background: HHKB Cannot Be Charged via USB Type-C

I recently purchased the PFU HHKB Professional HYBRID Type-S English layout / Charcoal.

When the battery level dropped to a few percent, I tried to charge it by connecting a USB Type-C cable, but the battery level wouldn’t increase at all.

Solution: HHKB Doesn't Have a Built-in Battery, So Replace the Batteries

As stated on the official website キーボードの電源が入りません。 | Happy Hacking Keyboard よくあるご質問, you can solve the battery depletion problem by replacing the batteries.

I should have known this since I inserted batteries when I purchased it, but for some reason I misunderstood that it had a built-in battery.

That’s all from the Gemba, where I solved the problem of HHKB not charging via USB Type-C.