@handy @ChrisJWilson @JohnPhilpin @Miraz @Munish In this instance I'd say it's mostly harmless SEO.

Like Miraz, I had assumed the keyboard had a battery — and I previously used one as my only computer for several months! — and I don't think it's unreasonable to assume more people think that the keyboard has a battery. The article explains that there is no battery and how it works.