Anonymous9 months ago000I understand that the unit can be operated from the built-in battery (2.2h max). My largest window is approx. 10m2. Is one battery charge enough for this? Thank you.Show in original language (German)AlbinL9799 months ago-101 Helpful answerThat's easily enough. You can clean many 10m2 windows with one battery charge.Show in original language (German)Comment1 comment