Miele Reduced Battery Capacity / Aged Battery

Robot vacuum starts but shuts off after a few minutes; battery indicator may drop quickly.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Worn-out Li‑ion cells, Imbalanced battery pack, Frequent partial charging cycles, High ambient temperature during charging

How to Fix / Troubleshooting

Safety first: Turn the robot OFF before accessing the battery compartment.

Steps:

  • 1. Perform full charge: Place the robot on the dock and charge it uninterrupted for at least 5 hours.
  • 2. Run a full discharge test: Start a cleaning cycle and let the robot run until it returns to the dock or shuts off. Note the runtime. If it is significantly shorter than specified for your model, the battery is likely worn.
  • 3. Replace battery (if user-replaceable): Power off the robot, open the battery compartment (usually on the underside), disconnect the old battery, and install a genuine Miele replacement with the same specifications. Secure the compartment and fully charge before use.

When to call a technician: If the battery is not user-accessible or the robot still shuts off quickly after battery replacement, the charging circuit or battery management system may be faulty and requires professional service.

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Repair Difficulty

Medium 3/5

Required Part

Li-ion Battery Pack
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