5200mAh Xiaomi P1904-4S1P-MM Saugroboter Akku passend für Xiaomi Robot Vacuum Cleaner Roborock 1C am August 14, 2025 Xiaomi Akku P1904-4S1P-MM Xiaomi P1904-4S1P-MM Akku Xiaomi P1904-4S1P-MM Akku kaufen Xiaomi Robot Vacuum Cleaner Roborock 1C Akku +