Charging error twenty (20) indicates that a battery fault has been detected.
Note: Confirm that you are using an authentic iRobot® Lithium-Ion battery. Unknown charging errors can occur with aftermarket-purchased batteries.
Remove and re-install your battery to resolve the issue.
If the error persists, contact iRobot Customer Care for additional assistance.
For expedited service, please ensure that you have the following:
• Your robot charged and with you
• Your robot’s serial number
• For warranty claims: Proof of purchase (receipt or invoice for purchase)
