iPhone 8 Plus Battery Replacement
Go to step 1Use this guide to revive your iPhone 8 Plus with a new battery. If your battery is swollen, take appropriate precautions.
This guide instructs you to fully detach the display assembly; this is intended to prevent accidental damage to the display cables. If you feel comfortable removing the battery without putting undue strain on the display cables, you can skip the steps for detaching the display. Additionally, while it’s possible to remove the adhesive strips securing the battery as soon as you open the phone, this guide recommends first removing the Taptic Engine. Doing so reduces the risk of breaking the lower adhesive strips accidentally, either by snagging them on the Taptic Engine, or by pulling the strips at too sharp of an angle.
For optimal performance, after completing this guide, calibrate your newly installed battery: Charge it to 100% and keep charging it for at least two more hours. Then use your iPhone until it shuts off due to low battery. Finally, charge it uninterrupted to 100%.
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Power off your iPhone before beginning disassembly.
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Remove the two 3.5 mm pentalobe screws from the bottom edge of the iPhone.
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Measure 3 mm from the tip and mark the opening pick with a permanent marker.
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Lay overlapping strips of clear packing tape over the iPhone's screen until the whole face is covered.
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If you can't get the suction cup to stick in the next few steps, fold a strong piece of tape (such as duct tape) into a handle and lift the screen with that instead.
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Use a hairdryer or prepare an iOpener and apply it to the lower edge of the iPhone for about 90 seconds in order to soften up the adhesive underneath.
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Pull up on the suction cup with firm, constant pressure to create a slight gap between the front panel and rear case.
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Insert an opening pick or other thin pry tool a few millimeters into the gap.
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Slide your pick around the corner and up the left edge of the phone, moving towards the volume control buttons and silent switch, breaking up the adhesive holding the display in place.
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Stop near the top left corner of the display.
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Re-insert your tool at the lower right corner of the iPhone, and slide it around the corner and up the right side of the phone to separate the adhesive.
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Slide an opening pick underneath the display along the top edge of the phone to loosen the last of the adhesive.
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Slide the display assembly slightly down (away from the top edge of the phone) to disengage the clips holding it to the rear case.
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Open the iPhone by swinging the display up from the left side, like the back cover of a book.
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Lean the display against something to keep it propped up while you're working on the phone.
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Remove four Phillips (JIS) screws securing the lower display cable bracket to the logic board, of the following lengths:
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Two 1.3 mm screws
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One 1.4 mm screw
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One 2.7 mm screw
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Use the point of a spudger to pry the battery connector up from its socket on the logic board.
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Bend the connector cable up slightly to prevent it from accidentally making contact with the socket and providing power to the phone during your repair.
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Use the tip of a spudger or a fingernail to disconnect the large lower display connector by prying it straight up from its socket.
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Disconnect the second lower display cable connector, directly behind the one you disconnected in the previous step.
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Remove the two tri-point Y000 screws securing the bracket over the front panel sensor assembly connector:
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One 1.0 mm screw
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One 1.2 mm screw
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Use the tip of a spudger or a fingernail to disconnect the front panel sensor assembly connector from its socket.
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Remove the three screws securing the L-shaped bracket next to the Taptic Engine:
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One 1.3 mm Y000 screw
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One 2.6 mm Phillips screw
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One 3.5 mm Phillips screw
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Use an opening pick to gently separate the adhered portion of the antenna flex cable from the top surface of the speaker.
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Use the point of a spudger to pry up and disconnect the antenna flex cable from the logic board.
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Use the point of your spudger to pry up and disconnect the other end of the antenna flex cable from its socket, next to the Lightning Port.
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Remove the three screws securing the Taptic Engine:
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Two 1.5 mm Phillips screws
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One 2.4 mm standoff screw
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Each piece of adhesive has a black pull-tab at the end, which is lightly adhered to the front surface of the battery.
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Slowly pull one battery adhesive tab away from the battery, towards the bottom of the iPhone.
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Pull steadily, maintaining constant tension on the strip until it slips out from between the battery and the rear case. For best results, pull the strip at as low an angle as possible, without snagging it on any of the iPhone's other components.
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If the battery adhesive tabs break during the removal process, use your fingers or blunt tweezers to retrieve the remaining length of adhesive, and continue pulling.
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Repeat the above steps to remove the remaining three adhesive strips.
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If you removed all of the adhesive strips successfully, skip the next step.
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Pull the string from side to side in a sawing motion all along the length of the battery to separate the adhesive. Do not deform or damage the battery.
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Remove the battery from the iPhone.
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Adhere the battery, disconnect it, and continue reassembling your device.
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If your new battery doesn’t have adhesive preinstalled, refer to this guide to replace the adhesive strips.
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Perform a force restart after reassembly. This can prevent several issues and simplify troubleshooting.
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