If the Xiaomi Robot Vacuum H40 can't be charged, please follow these steps:
1. If the auto-empty station is on a soft or uneven surface like carpet, the vacuum can not align properly for charging. For optimal performance, place the station on a hard, flat surface such as tile or wood;
2. Additionally, dust or debris on the charging contacts of either the robot or the station can block proper electrical connection. Be sure to gently clean these contact points with a dry cloth;
3. Also, confirm that the power cable is firmly plugged in at both the charging dock and the power outlet. A loose connection can interrupt the power supply;
4. Maintain enough space around the auto-empty station to allow the robot to dock properly without obstruction.