Casio DT-900 User Manual
Page 19
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![background image](/files/828999/content/doc019.png)
E-21
3
Remove the old lithium backup battery from
the backup battery compartment with a
ballpoint pen or other fine-tipped object as
shown in the figure on the right. Wipe the new
lithium battery with a dry cloth and then insert
it into the backup battery compartment with
the plus (+) side facing up.
4
Close the cover and tighten the screws.
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