Canon SX10IS PowerShot SX10 IS Camera User Guide - Page 267

265 Replacing the Date Battery If the Date/Time in the Set up menu appears when the camera power is turned on, the date battery charge is low and the date and time setting have been lost. Please purchase a lithium coin battery (CR1220) and replace it as follows. The date battery is preinstalled at the factory and may therefore expire earlier than its rated lifespan after the camera has been purchased. Be particularly careful to keep the date batteries out of the reach of children. Seek medical assistance immediately if a child swallows a battery since corrosive battery fluids could damage the stomach or intestinal wall. 1 Confirm that the camera is turned off. 2 Slide the battery cover lock and open the cover. 3 Remove the AA-size batteries, then pull out the battery holder by hooking your fingernail under the center of the battery holder edge. Appendix