Difficulty
Moderate
Steps
7
Time Required
5 - 10 minutes
Sections
1
- Battery
- 7 steps
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0
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Introduction
What you need
Step 1
Battery
- Turn off the calculator by pressing the [Shift] button.
- Press the [AC][OFF] button.
Turn off the calculator by pressing the [Shift] button.
Press the [AC][OFF] button.
1024
Step 2
- Flip the calculator over so that the back panel faces forward.
- Use a Phillips #0 screwdriver to remove the screw in the upper right corner.
- If the screw is not unfastening, do not force it because it can strip the screw. If the screw is already stripped see the How to Remove a Stripped Screw guide.
Flip the calculator over so that the back panel faces forward.
Use a Phillips #0 screwdriver to remove the screw in the upper right corner.
If the screw is not unfastening, do not force it because it can strip the screw. If the screw is already stripped see the How to Remove a Stripped Screw guide.
Step 3
- Remove the battery cover.
Remove the battery cover.
Step 4
- Insert the spudger in the available slot in the middle of the right side.
- Use the spudger to pry out the battery.
- Be gentle when removing the battery to avoid damaging it.
Insert the spudger in the available slot in the middle of the right side.
Use the spudger to pry out the battery.
Be gentle when removing the battery to avoid damaging it.
Step 5
- Place the new LR44 alkaline battery into the calculator.
- Be sure that the + sign is at the bottom.
Place the new LR44 alkaline battery into the calculator.
Be sure that the + sign is at the bottom.
Step 6
- Reattach the battery cover.
- Insert the screw for the battery cover using a Phillips #0 screwdriver.
Reattach the battery cover.
Insert the screw for the battery cover using a Phillips #0 screwdriver.
Step 7
- Reset the calculator by pressing [ON].
- Press the [shift] button.
- Press the [9] [CLR] button to clear the data.
- Press the [3][ALL] button option.
- Press [=] [yes] button to agree.
- Press [AC] key to reset.
Reset the calculator by pressing [ON].
Press the [shift] button.
Press the [9] [CLR] button to clear the data.
Press the [3][ALL] button option.
Press [=] [yes] button to agree.
Press [AC] key to reset.
You have now successfully replaced a Casio FX-300ES battery.
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Author
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Maha
Member since: 07/08/2020
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Team
York University, Team S1-G22, Allen Summer 2020
Member of York University, Team S1-G22, Allen Summer 2020
YORK-ALLEN-SU20S1G22
1 Member
2 Guides authored
Tomatoman - Feb 27, 2022
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Below is a detailed video showing the battery replacement process.
