Robot vacuum reports 'Error 11' / voice prompt 'Error 11: Battery error' and will not start cleaning or shuts down quickly.

Safety first: Turn off the robot and disconnect it from the dock. Do not puncture or crush the battery. If the battery is swollen, handle with extreme care and recycle properly.

• 1. Power reset:
  • Turn the robot off and leave it off the dock for 5–10 minutes.
  • Place it back on the dock and allow it to charge for at least 3 hours.
• 2. Check battery status in app:
  • Open the Xiaomi Home app and check the reported battery percentage and health (if available).
• 3. Inspect the battery (advanced):
  • Remove the bottom cover to access the battery compartment.
  • Disconnect the battery connector from the mainboard.
  • Inspect the pack for swelling, leakage, or damage.
• 4. Reseat or replace:
  • Reconnect the battery firmly and reassemble the robot.
  • If the error persists or the battery is visibly swollen or very old (2–3+ years), replace the battery pack with a compatible Xiaomi battery.
• 5. If a new battery does not resolve the error:
  • The mainboard charging or battery sensing circuit may be faulty; contact a service center or replace the mainboard.