Fix Your Stuff Community Store

Casio FX-991MS Battery Replacement

Introduction

This guide demonstrates a step-by-step process on how to replace a CASIO FX-991MS battery. While the scientific calculator has a solar panel, the battery is still able to die after long usage, therefore it is necesary to understand how to replace it. Here you will learn how to quickly swap out the battery quickly and efficiently.

What you need

  1. Casio FX-991MS Battery Replacement, Battery: step 1, image 1 of 2 Casio FX-991MS Battery Replacement, Battery: step 1, image 2 of 2

    • Remove the case and flip the calculator backwards.

    Edit

  2. Casio FX-991MS Battery Replacement: step 2, image 1 of 1

    • Use a Philips #0 head screwdriver to remove the five screws on the back of the device.

    Edit

  4. Casio FX-991MS Battery Replacement: step 3, image 1 of 2 Casio FX-991MS Battery Replacement: step 3, image 2 of 2

    • 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.

    Edit

  5. Casio FX-991MS Battery Replacement: step 4, image 1 of 3 Casio FX-991MS Battery Replacement: step 4, image 2 of 3 Casio FX-991MS Battery Replacement: step 4, image 3 of 3

    • Use an opening tool to gently remove the battery from the device.

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

13 other people completed this guide.

Author

with 2 other contributors

Anthony

Member since: 01/22/21

421 Reputation

1 Guide authored

Badges: 9

+6 more badges

Team

York University, Team S1-G16, Melo-Thaiss Winter 2021 Member of York University, Team S1-G16, Melo-Thaiss Winter 2021

YORK-MELO-THAISS-W21S1G16

1 Member

3 Guides authored

0 Guide Comments

Add Comment

View Statistics:

Past 24 Hours: 8

Past 7 Days: 96

Past 30 Days: 347

All Time: 15,468