Introduction
Remove the battery in your Nintendo 3DS to replace it with a new one.
What you need
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Unscrew the four Phillips #00 screws along the top of the back cover.
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Grab the top edge of the back cover with your opposite hand so that the cover does not fall back into place.
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Pull the back cover up and away from the rest of the device to remove it.
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Insert a plastic opening tool into the notch in the lower case above the battery.
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Pry the battery up with the plastic opening tool.
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Grab the top edge of the battery and lift it out of the lower case.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.