Canon Pro90 PowerShot Pro90IS Camera User Guide - Page 123
Appendices
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Appendices Replacing the Button Battery If the Set Date/Time menu appears when you turn on the camera power, the button battery charge is low and the date and time settings have been lost. Please replace the battery with a generic CR2025 lithium button battery with the following procedures. The button 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 button 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 Turn the main dial to . 2 Slide the CF card slot cover in the direction of the arrow and lift it to open. 1 Groove 3 Insert a fingernail at 1 in the diagram and lift up to remove the button battery holder. 4 Remove the battery from the holder by pulling it in the direction of the arrow. Appendices 121
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