Features: 1. High-quality replacement battery for robot vacuum cleaner for Xiaomi Robot Vacuum Cleaner Roborock S50/S51/S55. 2. 5200mAh 6500mAh Large capacity rechargeable battery. No door shaking, safety. 3. The replacement battery for the robot vacuum cleaner is of high quality. It is made of high-strength materials. Long service life. 4. The accessories are durable and easy to install, which helps your vacuum cleaner work longer. 5. Important and necessary accessories for Xiaomi Robot Vacuum Cleaner Roborock S50/S51/S55. Package Includes: 1 Pc Vacuum Cleaner Replacement Battery Specifications: Item: Battery for Xiaomi Robot Vacuum Cleaner Roborock S50; S51; S55 Cell Type: Lithium Voltage: 14.4V Color: Red (as picture shows) Battery Capacity: 5200mAh 6500mAh Size: Approx. 13.7x4.4x4.5cm/5.39x1.73x1.77in Weight: Approx. 400g Note: 1. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before you bid. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you