Compatibility: Compatible with eufy Robot Vacuum Omni S2. Reliable Battery Performance: Crafted with high performance battery cells, providing top-tier safety features to prevent short-circuiting, overcharging, over-discharging, and overheating. Easy to Install: Simply remove the vacuum's battery cover, remove the old battery, and insert the new one with the sticker side up. Ensure the battery wires are neatly tucked for a perfect fit. After-Sale Service: We are committed to providing excellent customer service. Our friendly support team is available 24/7 to assist with any questions or concerns. Genuine eufy Accessory: To extend the lifespan of your vacuum, always choose genuine eufy accessories.