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This one cannot be used for charging. The battery inside the robot is used to support the safety device to prevent falling. Wait 20 seconds after starting up until the blue light stop flashing，Then start working.
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eBay
Made from durable plastic and featuring an eco-friendly design, this white robot is perfect for keeping your windows sparkling clean with its advanced technology.
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Mamibot W120-DP Robot Window Cleaner. With 3200Pa Strong Suction & Multiple Cleaning Modes. For High-Rise Building Windows & Glass.
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Features: Three Cleaning Paths: First up and then down, first left and then down, first right and then down, and return to the starting position. Cleaning Area: The window cleaner can easily clean the framed glass window with a size small than 6*5 meters. Anti-falling Control: Comes with a 4.5m safety rope and strong vacuum absorption to anti-fall. Remote Control Function: The included remote controller can control cleaning mode switching, start/stop. Fast Cleaning Speed: 4mins/square meter cleaning speed (clean twice everywhere), do the cleaning jobs with high speed and high efficiency. Max. 30 Minutes Standby Battery: There is a battery backup to prevent an unexpected power outage.
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The Sunsmai Window Cleaning Robot is a compact and portable robotic cleaner designed for efficient cleaning of windows. With a powerful suction force of 2800Pa, this robot effectively removes dirt, dust, and debris from glass surfaces.
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