Robot vacuum reports C13 and stops; may say 'Please check the battery' or shuts down quickly.

Safety first: Turn the robot OFF and remove it from the dock.

• Clean charging contacts: Wipe the robot's charging pads and the dock contacts with a dry cloth.
• Check battery connection: If accessible, open the battery compartment and ensure the battery plug is firmly connected.
• Fully charge: Place the robot on the dock and allow it to charge uninterrupted for at least 4–6 hours.
• Test runtime: Start a cleaning cycle and observe how long it runs before shutting down.

If C13 persists or runtime is very short: Replace the battery pack with a compatible Ecovacs battery of the same voltage and capacity.