Casio FX-991EX Battery Replacement

Written By: FarmYard Gaming
  • Comments: 1
Casio FX-991EX Battery Replacement

Difficulty

Easy

Steps

4

Time Required

2 minutes

Introduction

The Casio FX-991EX can malfunction if the battery is discharged, even with solar power. Thankfully, replacing it is a simple job.

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    • Remove the battery cover's screw using a Philips #0 screwdriver.

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    • Use a spudger to remove the battery using the gap to the right.

    • Don't use sharp objects that may cause harm or damage. The battery can be hard to pop out, but will do so. Dispose of a damaged battery via an e-waste collection site.

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    • The FX-991EX uses a 1.5V LR44 battery.

    • Slot the new battery into the compartment. Ensure that the positive side (with writing) faces up...

    • And the negative side faces the calculator's screen.

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    • Slot the battery cover back on and screw it down.

Conclusion

If you need to reset the calculator after this, it's SHIFT+9 > 3 > =.

Otherwise, you're ready to crunch numbers again!

Author

FarmYard Gaming

Member since: 27/08/20

1483 Reputation

One comment

Just discovered during a lecture that my battery has become a spicy pillow - if you're leaving this in storage be careful and monitor it, lest it explode and/or warp the case irreparably.

FarmYard Gaming -