ERROR CODE C--6C CANON DIGITAL REBEL

This code means that your backup (date/time) battery is dead and needs to be replaced. This is a small button battery that maintains date and time settings and other settings when the main battery is removed from the camera. You will need to get a CR2016 battery (button battery). It is located in the battery compartment, in a plastic holder right next to the battery door hinge.The holder should slide out of its socket.