Casio · Calculators

Casio fx-82ES PLUS battery

1 × 1.5V alkaline cell

Printed IDs: fx-82ES PLUS

How to replace it

Notes	Follow Casio user’s guide battery replacement steps for your model.

Last checked 7 October 2026

Casio fx-82ES PLUS uses 1 × AAA.

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Optional tools for opening, testing or charging — separate from the battery answer.

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Quick good / low / dead check for household cells
Crude check only — does not measure capacity under realistic load.
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Buy links are optional and separate from the battery answer.