Purchased in April 2020, currently the battery is not fully charged and after 20 seconds the whole device stops working even though the blue light is on. The device, when working properly, only works for about 15 minutes max. I charge and use every other day. The floor wiper did not convince me. Spotty at best. I don't even care anymore. I wipe by hand and it's more efficient and faster if I do it myself. I had a Roomba for 6 years prior to purchasing this unit. I will never give up on Roomba once this unit finally stops working.