Safety first: Use only the specified Medion charger and unplug it before cleaning contacts.

Verify charger rating: Check the output voltage and current on the charger label and ensure it matches the vacuum’s requirements.
Clean contacts: Gently clean charging contacts on the dock and battery with a dry cloth.
Test with another charger: If available, try a known-good original Medion charger.
Replace battery: If charging remains abnormally slow and the charger is good, the battery pack may be failing and should be replaced.

Vacuum charges extremely slowly or never reaches full charge

Possible Causes