Features:1. High quality replacement robotic vacuum cleaner battery for Xiaomi Roborock S50/S51/S55 robotic vacuum cleaner.2.5200mAh 6500mAh Large capacity rechargeable battery. No shaking, safe security.3. The replacement robotic vacuum cleaner battery is of high quality. It is made of high strength materials. Long time service.4. The attachments are durable and easy to install, keeping your vacuum cleaner running longer.5. Essential and necessary accessories of the Xiaomi Roborock S50/S51/S55 robot vacuum cleaner. Package Include: 1 x Replacement Vacuum Cleaner Battery Specifications: Item: Battery for Xiaomi Roborock S50 Robotic Vacuum Cleaner; S51; S55 cellsType: Lithium Voltage: 14.4V Color: Red (as picture shown) Battery Capacity: 5200mAh 6500mAh Size: Approx. 13.7 x 4.4 x 4.5cm/5.39 x 1.73 x 1.77 in Weight: Approx. 400gNote: 1. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before bidding.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks