Casio FX-991MS Battery Replacement

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Casio FX-991MS Battery Replacement: crwdns2935265:00crwdnd2935265:01crwdnd2935265:02crwdne2935265:0

Casio FX-991MS Battery Replacement: crwdns2935265:00crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

The top half of the calculator is tightly closed.
Carefully use an opening tool to slowly pry open the sides till it opens.
Apply a little bit of force if this is the first time opening the calculator.

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