eufy Replacement Battery compatible with eufy C10 Reliable Battery Performance: Made with high-quality battery cells, offering top-tier safety features against short circuiting, overcharging, over-discharging, and overheating. It boasts a durable lifespan, with running times of 60 to 180 minutes. (Note: The actual running time will vary based on the machine model and its operating mode.) Easy to Install: Simply remove your vacuum's battery cover, unlatch to take out the old battery, then insert the new one with the sticker side up. Ensure the battery wires are neatly tucked inside the compartment for a perfect fit. After-Sale Service: We are dedicated to providing excellent customer service, backed by a 1-year warranty. Our friendly support team is available 24/7 to assist with any questions or concerns. Note: To protect your robot vacuum machine and extend its lifespan, buying our branded robot vacuum replacement parts is recommended