Introduction
I recently encountered a spicy pillow (swelling battery) in my GPD WIN 4 and it needed replacing,
It was a bit tricky at first but with a prying tool and a size 00 Phillips screwdriver (I used the PH00 bit from the iFixit kit) it was relatively easy
What you need
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From the bottom of the device (the side with a single USB-C port and not with the Occulink port) pry off the silver band. this is the only glued part.
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Remove the 2 screws on the right hand side of the device (if the screen is facing away from you) and the 6 screws from the underside.
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NOTE: if the battery swelling is significant this will pop open on its own, please take care.
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Using your pry tool, open the bottom and top on the case with the screen face down, there are 2 cables, one on the left and one on the right, one is for Wi-Fi the other is the back shell buttons. these will need to be dissconnected.
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There are 2 screws holding the fan in, these have a wide head, and are located on the left and right of the fan, and the cable towards to bottom.
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The fan also has a plastic tape/glued sheet to direct air though the heatsink, you can leave it on the fan and pry it off the heatsink using the fan.
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there are 3 screws in the main heatsink, left, top and bottom that have to come out.
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Once the screws are removed the heatsink can come out exposing the battery connector.
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Next is the hard part, disconnect the battery connector, like a little Lego, then carefully pry the battery from the case, this has double sided tape with no removal strips. I used an old sim carrier card (the smooth side)
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Once the battery is out, this is the perfect opportunity to replace the SSD and remove dust from the fan and heatsink.
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Now the home strech
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Install the new battery, this can be tricky as some 3rd party batteries don't line up 100%, my battery ribbon has a slight twist in it to get the angle right.
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Now reverse the order of operations
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reinstall the heatsink and 3 screws, careful not to misalign the thermal pads
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reinstall the fan with it's 2 screws, ensure the tape is on the heatsink and fan and the cable is connected
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Connect the back shell, and the 2 cables, Wi-Fi and buttons
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snap closed, install the 8 screws, 2 from the bottom and 6 on the back
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reattach (if the glue works or apply new glue) the silver edging strip
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To reassemble your device, follow these instructions in reverse order.
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