Introduction
If your battery is inflating like a balloon, Or is not holding a charge or not working altogether, this guide will teach you how to fix those.
Tools
Parts
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In order to open the joy-con, remove the joy-con from the console. Then, Using the Tri-point Y00 Screwdriver, remove the four corner screws. MAKE SURE TO OPEN SLOWLY!!!
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Using the opening pick, insert it on the side of the battery in-between the battery and the battery casing then pry the battery up.
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With the battery connector in hand, (or tweezers!) place it over the connector on the motherboard, and press down. If it does not connect together, flip over and try again.
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To put the case back together, then place the case right above the case and then push it together until you hear a click.
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In order to replace the screws, place the four screws in their respective holes and screw them in using the Tri-point Y00 Screwdriver.
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Now your Joy-con should work now.