I bought this device for cleaning a house in the village. My parents and I have vacuum cleaners from a British company in the apartments (the name is in shortcomings), so there is something to compare with. The result of the first days of work: it seemed that the battery was more capacious than that of a competitor (I vacuumed a 3-room apartment of 68 sq. M. at the second speed without additional charging. There is enough power. Let's see how much it will work in the end.