Released 1995, identified by word TI-92 labeled on upper right corner of the screen

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How do you change the TI-92 lithium battery?

I have replaced the AA batteries but nothing appears

on the display window.

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javier, to replace the lithium backup battery, remove the back cover from the unit and unscrew the tiny screw holding the lithium battery cover in place. Remove the old battery and install a new CR2032, positive (+) side up. Replace the cover and the screw.

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Hope this helps, good luck.

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javier will be eternally grateful.
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