Hello Chris, I would say 30 to 45 min. at least. I have never measured it exactly. But one charge is certainly enough for 30 minutes of cleaning...

I haven't measured it exactly either. Always charge in good time beforehand. I think the charging process takes 1 to 2 hours when the battery is completely empty. But the battery lasts for cleaning about 60 - 80 square metres. The water in the water tank is used up earlier.