Goods Scene Troubleshooting
iRobot Charging Error 109 – Battery failure detected
Charging Error 109 means a battery failure has been detected and the battery may need replacement.
Issue meaning
What this issue means
Charging Error 109 means a battery failure has been detected and the battery may need replacement.
Start here
First checks
Confirm that the battery is an authentic iRobot battery, then remove and reinstall it. If the error persists, the battery may require replacement or service.
Inspection
Area to inspect
Battery identity, seating, battery contacts and repeat behavior.
Goods Scene guidance
What to do next
Persistent 109 after reseating an authentic battery is stronger evidence of a battery fault than of a dock problem.
Practical guidance is kept separate from manufacturer wording.