Skip to content

Precautions

Safety Precautions

Thank you for purchasing this CASIO product.
Be sure to read the "Safety Precautions" before using this product to ensure that you use it correctly. Be sure to keep all user documentation handy for future reference.

  • Danger

    Indicates something that creates the major risk of death or serious personal injury.

Button Type and Coin Type Battery Precautions (fx-991CW only)

  • Take care to ensure that a battery will not be swallowed accidentally.
    Particular care is required to keep batteries away from children.

Should a battery be swallowed accidentally or if there is a possibility that a battery has been swallowed, immediately contact a physician.
Swallowing a battery can result in chemical burns, mucosal tissue penetration, and other serious problems that create the risk of death.

  • Warning

    Indicates something that creates the risk of death or serious personal injury.

Display Screen

  • Do not press the LCD or subject it to strong impact.

Doing so can cause the LCD glass to crack, creating the risk of personal injury.

  • Should the LCD become cracked, never touch any of the liquid inside.

LCD liquid getting on the skin creates the risk of skin irritation.
Should LCD liquid get into your mouth, immediately rinse your mouth out and contact your physician.
Should LCD liquid get in your eyes or on your skin, rinse with clean water and then contact your physician.

Battery Precautions

  • Should fluid leaking from a battery get on your skin or clothing, immediately rinse it off with clean water.

Battery fluid getting into the eyes creates the risk of eyesight loss, etc. Rinse the eyes and then immediately contact a physician.

  • Caution

    Indicates something that creates the risk of minor personal injury or physical damage.

Observe the precautions below. Failure to do so can cause a battery to rupture, creating the risk of fire, personal injury, and soiling of nearby objects by leaking fluid.

  • Do not try to take a battery apart and never allow a battery to become shorted.

    Do not charge a non-rechargeable battery.

    Do not expose a battery to heat or throw it into fire.

  • Use only the specified type of battery.

    Load a battery with its poles (plus (+) and minus (–)) facing correctly.

    Replace the battery as soon as possible after it goes dead.

  • Battery Precautions

  • Observe the precautions below. Failure to do so can cause the battery to explode or leak flammable liquid or gas.

Use only the type of battery that is specified for this product.

Do not burn a battery or dispose of it in an incinerator, or by mechanical crushing or cutting.

Do not subject a battery to excessively high or low temperatures during use, storage, or transport.

Do not subject a battery to excessively low barometric pressure during use, storage, or transport.

How to Replace the Battery

The procedure for replacing the battery varies depending on the product and region.

Product name Battery type Region of purchase Battery replacement method
fx-991CW Built-in solar cell;
button battery LR44 × 1		 US and Canada For safety reasons, please do not replace the battery yourself.
Always leave battery replacement up to an authorized CASIO service center.
Other than US and Canada Please replace the battery yourself.
fx-570CW AAA-size battery R03 (UM-4) All regions Please replace the battery yourself.

Handling Precautions

fx-570CW: Even if the calculator is operating normally, replace the battery at least once every two years (R03).
fx-991CW: Even if the calculator is operating normally, replace the battery at least once every two years (LR44).
A dead battery can leak, causing damage to and malfunction of the calculator. Never leave a dead battery in the calculator. Do not try using the calculator while the battery is completely dead (fx-991CW).

You will be charged for malfunction or damage due to battery leakage, which is not covered by the warranty.

The battery that comes with the calculator discharges slightly during shipment and storage. Because of this, it may require replacement sooner than the normal expected battery life.

Avoid use and storage of the calculator in areas subjected to temperature extremes, and large amounts of humidity and dust.

Do not subject the calculator to excessive impact, pressure, or bending.

Never try to take the calculator apart.

Use a soft, dry cloth to clean the exterior of the calculator.

Whenever discarding the calculator or batteries, be sure to do so in accordance with the laws and regulations in your particular area.

print this page
Top of page