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This guide demonstrates the process of replacing the battery for a Casio FX-991ES Plus calculator. The battery will need to be replaced when a dim or distorted display is noticed, or when the calculator stops working. The calculator is equipped with a solar cell that can provide power to the device, but if the battery becomes old or bloated, it should be replaced in order to prevent leakage that might damage the calculator. Although this calculator uses two-way power, it is inconvenient to depend on having to charge the built-in solar cell when the battery is dead.
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Make sure the calculator is off. If not, turn it off by pressing the [Shift] button then the [AC] [OFF] button.
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Thank you so much! God bless you.
Can you send me one please
In Jaigaon india
Thank you ,
🙏
La touche ON de ma calculatrice ne fonctionne plus comment faire ?