Casio · Calculators

Casio fx-570EX battery

1 × 1.5V alkaline cell

Printed IDs: fx-570EX

How to replace it

Follow the manufacturer steps in the sources below.

Last checked 7 October 2026

Casio fx-570EX uses 1 × AAA.

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

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Ansmann Energy Check LCD
Quick household cell check (good / low / replace)
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ZTS Mini-MBT Multi-Battery Tester
More informative state-of-charge style checks across common formats
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Battery tester
Quick good / low / dead check for household cells
Crude check only — does not measure capacity under realistic load.
How to test a battery Buy on Amazon

Buy links are optional and separate from the battery answer.

A fresh 1 × AAA should restore Casio fx-570EX if the battery was the problem. Work through the checks below before replacing the device.

Check the battery type
This device needs 1 × AAA (alkaline). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
Check known model-specific issues
Do not confuse with fx-991EX (solar+LR44) Sibling of fx-991EX; EX PDF distinguishes AAA (570) vs solar+LR44 (991) Do not confuse with fx-991 sibling models that use solar + LR44.
Confirm the battery itself
If you have a battery tester or multimeter, check the cell. A low open-circuit voltage often means replace; for rechargeable AA/AAA, a capacity test is more informative than voltage alone.
Still not responding?
If a correct, fresh battery installed properly does not restore the device, the fault may be elsewhere — the device may need service or replacement.

These checks follow this device’s orientation, battery type, and important notes from the maker.