Charging error 107 indicates the battery is not charging because it is too cold for charging. Ensure the robot is being charged at room temperature, between 60°-75 °F (15.5°-23 °C). If your robot has been outside in a freezing environment (such as in a cold car trunk), allow it to come to room temperature before attempting to charge.
If the error persists, please contact iRobot Customer Care.
For expedited service, please have the following ready: