CASIO fx-50FH II Scientific Calculator Battery Replacement

Introduction

This guide demonstrates the process of replacing the battery in a CASIO fx-50FH II scientific calculator. Batteries have a limited lifespan, so anything battery-powered will eventually cease functioning. In the worst case, old or damaged batteries may leak and damage or destroy the calculator. Also, alkaline residue can cause chemical burns, so carefully follow every safety precaution if your calculator's battery is damaged.

What you need

Step 1 Battery

CASIO fx-50FH II Scientific Calculator Battery Replacement, Battery: step 1, image 1 of 1

To turn the calculator off, first press the "shift" button.
Release the "shift" button, then press the "AC" button.

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Step 2

Place the calculator face down, then use a Phillips #00 screwdriver to remove the single screw securing the battery hatch in the top right corner.

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Step 3

CASIO fx-50FH II Scientific Calculator Battery Replacement: step 3, image 3 of 3

Push the battery hatch to the right until it slides off.

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Step 4

CASIO fx-50FH II Scientific Calculator Battery Replacement: step 4, image 3 of 3

Put on a pair of protective gloves before handling the battery to eliminate the risk of chemical burns.
Insert the tip of a spudger into the indent on the right-hand side of the battery to lift the edge of the battery up.
Lift the battery up and out.

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Step 5

Inspect the battery compartment any alkaline residue.
If no residue is present, skip to Step 7.

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Step 6

CASIO fx-50FH II Scientific Calculator Battery Replacement: step 6, image 3 of 3

Use a cotton swab dabbed with white vinegar to wipe the alkaline off the battery compartment.
Use a dry cotton swab to remove the vinegar and alkaline residues.
Let the battery compartment dry completely.