Battery life isn't in the specs yet because it's TBD. We're targeting 3 hours, but that's not a final number and might change if we notice that it's too heavy or we still have usable mass budget etc.
Three hours seems very low, but I guess it count be doable if the charge time is one hour or less. That way I could see it like, it forces you to stretch your legs.
Damn... I'm guessing swappable batteries aren't on the roadmap.
But the tech looks really cool, especially because MAYBE it could be used while laying in the bed.
Best of luck! I hope you'll be profitable and continue to develop the tech!