Introduction
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Try to ensure the battery is drained to below 15%. This reduces the risk of nasty surprises if the battery is damaged during removal.
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Use a thin card or prying tool to remove the shell of the case.
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Take note of the position of the clips, shown in the images. This will help you apply pressure in the right positions around the shell.
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Apply insulation tape to cover one of the solder points. This helps avoid short circuiting the battery whilst desoldering.
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Use isopropyl alcohol to clean the solder pads.
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Solder the contacts for the new battery in place, ensuring the red and black wires are connected the same way as the old battery.
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Once you are satisfied that the new battery is working as intended, re-insert the body of the case into the shell.
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