What you need
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This is the calculator in question.
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Features a black and white dot matrix screen.
Ask FixBot
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Turn the calculator over.
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Locate the six screws on the rear of the device.
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These are Philips #00 screws.
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Once the screws are removed, carefully lift the back panel off, lifting the top end first.
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Place the panel to one side.
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You can now see the battery.
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Now you can insert the new battery
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Ensure you place it in spring-first.
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Congratulations! You have replaced the battery.
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When reassembling, take care not to trap the red or black wires in the screws as this would sever them, making the calculator unusable.
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To reassemble your device, follow these instructions in reverse order, noting the two reassembly instructions in the last step.
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3 Guide Comments
For some reason the two top screws made the calculator unstable, but removing them made it stable. Only occurred after removing the battery
