I had the same thought--speculating, perhaps it's like you say and we'll see a disclosure somewhere that it's "Up to 2 years, with 1 weekly Bluetooth pairing, 1 second of backlight use per day, no step counter."

Though, the CR2016 is a pretty big battery vs typical watch batteries, and in some other Casio watches are used as 10-year batteries.

I doubt that, I have a ABL-100 and its step counter cannot be turned off. It even beeps at you when you sit on your butt for too long.

However, the manual recommends to be sparing with the backlight.