Encoder data is critical for the operation of the robot. When the controller is turned OFF the memory data is backed up by battery packs. The batteries must be replaced as soon as a battery alarm appears to avoid loss of data. It is recommended that these batteries be replaced at the recommended service intervals prior to an alarm occurrence as the recovery process can be very time consuming and costly. Refer to the service manuals for part reference number based on manipulator type or contact a Service Engineer at Carbines Engineering for assistance.