iRobot Roomba 621 The box, instruction manual, etc. are all included, but the battery is dead (cannot be charged). There was blue corrosion on the battery contacts, so I scraped it off and it started conducting electricity, allowing charging to complete. However, although it operates, it stops immediately, possibly due to battery leakage. Therefore, I will remove the battery and ship the unit, so please prepare a separate battery for use. The Auto Virtual Wall, battery, and cleaning cutter are unused. I have cleaned it thoroughly, but please understand that this is a used item.