Charging error twenty (20) indicates 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 have the following ready:
• Your robot charged and with you
• Your robot's Serial number
• For warranty claims: Proof of purchase (receipt or invoice for purchase from an authorized retailer)
