Introduction
If your Dell XPS 15 9550 laptop will not power on without being plugged in or not hold a charge for an extended period of time, you may need to replace your battery.
What you need
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Turn the laptop upside down.
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Use a T5 Torx Screwdriver to remove the ten 3 mm long screws from the perimeter of the back of the laptop.
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Open up the information panel door (on the middle of the back side).
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While holding the door open, use a Phillips #00 Screwdriver to remove the two 10 mm long screws.
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Carefully lift the 2 corners of the back panel close to the hinge upwards, to release the whole panel.
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Using a Philips #00 Screwdriver, remove the seven 3 mm long screws from the perimeter of the battery.
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Firmly grasp the black connector on both sides.
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Carefully pull the connector towards the battery, releasing the connector and the battery from the laptop.
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