Replacing the Date/Time Battery
The life of the date/time battery (back-up battery) is approximately 7 years. If the Date/Time settings screen appears every time the camera is turned on, replace the date/time battery with a new one (CR1220).
Turn off the camera.Remove the date/time battery holder.Replace the battery.● Insert the battery with (+) and (-) sides oriented correctly.
Insert the battery holder.Turn on the camera and set the date/time (p. 18).