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Flip the device over to access the battery cover.

Using a spudger, pry the release tab down and then pull the battery door up and off the calculator.

Remove:

2 7.2mm Phillips #0 screws

1 15.3mm Phillips #0 screw, and a battery retaining clip.

The CR1616 coin cell battery preserves settings and programs in memory while the main batteries are being changed.

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