Parts

This is the calculator in question.
  • This is the calculator in question.

    • Features a black and white dot matrix screen.

Turn the calculator over. Locate the six screws on the rear of the device.
  • Turn the calculator over.

  • Locate the six screws on the rear of the device.

    • These are Philips #00 screws.

  • Keep the screws you remove in a safe place so they don't get lost.

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Once the screws are removed, carefully lift the back panel off, lifting the top end first. Place the panel to one side.
  • Once the screws are removed, carefully lift the back panel off, lifting the top end first.

  • Place the panel to one side.

  • You can now see the battery.

Remove the battery
  • Remove the battery

  • Lift it up from the right hand side to avoid damaging the spring.

  • You may find this easier to do by prying it out with the screwdriver.

Now you can insert the new battery Ensure you place it in spring-first.
  • Now you can insert the new battery

    • Ensure you place it in spring-first.

  • Congratulations! You have replaced the battery.

  • When reassembling, take care not to trap the red or black wires in the screws as this would sever them, making the calculator unusable.

  • Once reassembled, the calculator will be turned on. Turn it off to save battery by pressing Shift --> AC.

Conclusion

To reassemble your device, follow these instructions in reverse order, noting the two reassembly instructions in the last step.

21 other people completed this guide.

Sam

Member since: 09/23/2012

815 Reputation

1 Guide authored

For some reason the two top screws made the calculator unstable, but removing them made it stable. Only occurred after removing the battery

Mida Galbraith - Reply

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