How to replace iPhone 8 Plus Battery Replacement Guide
- Pentalobe screwdriver
- Phillips screwdriver
- Metal spatula
- Plastic spatula
- Suction cup
Preface
Use the following picture guide to easily change the battery on your iPhone & and iPhone & Plus. Make sure that you install the home button from your old display into the new one. Without your original home button, the fingerprint sensor with touch ID will not work.
You should make a backup of your iPhone before changing the display and then turn it off.
Step 1: Remove Pentalobe screws
Remove the two 3.4 mm pentalobe screws on the bottom edge of the iPhone.
Opening the iPhone's display will compromise its waterproof seals. Have replacement seals ready before you proceed past this step, or take care to avoid liquid exposure if you reassemble your iPhone without replacing the seals.
Step 2: Open display
Attach a suction cup to the lower half of the display assembly, just above the home button.
Be sure the suction cup does not overlap with the home button, as this will prevent a seal from forming between the suction cup and front glass.
Step 3: Detach display from frame
Pull up on the suction cup to create a small gap between the display assembly and the rear case.
Insert the flat end of a spudger into the gap.
The watertight adhesive holding the display in place is very strong, and creating this initial gap takes a significant amount of force. If you're having a hard time opening a gap, rock the screen up and down to weaken the adhesive until you can fit a spudger inside.
Slide the spudger up the left side of the iPhone, starting at the lower edge and moving towards the volume control buttons and silent switch.
Do not pry along the top edge of the phone, you risk damaging the plastic clips securing the display.
Insert the flat edge of a spudger into the bottom right corner of the device.
Twist the spudger to widen the gap between the display assembly and the rear case.
Slide the flat end of the spudger up the right side of the phone to break up the adhesive holding the display in place.
Pull up on the suction cup to lift up the display and open the iPhone.
Do not raise the display more than 10º as there are ribbon cables along the right edge of the device connecting the display to the logic board.
Slide an opening pick along the top edge of the iPhone, between the rear case and front panel, to break up the remaining adhesive holding the screen in place.
Be careful not to damage the plastic clips on the top edge of the phone.
Pull the display assembly slightly away from the top edge of the phone to disengage the clips holding it to the rear case.
Open the iPhone by swinging the display up from the left side, like the back cover of a book.
Don't try to fully separate the display yet, as several fragile ribbon cables still connect it to the iPhone's logic board.
Step 4: Remove cover
Remove four tri-point Y000 screws securing the lower connector bracket, of the following lengths:
Three 1.2 mm screws
One 2.4 mm screw
Throughout this repair, keep track of each screw and make sure it goes back exactly where it came from to avoid damaging your iPhone.
Remove the three tri-point Y000 screws securing the bracket over the front panel sensor assembly connector:
One 1.3 mm screw
Two 1.0 mm screws
Remove the bracket.
Step 5: Detach connectors
Use the point of a spudger to pry the battery connector up from its socket on the logic board.
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.
Use a spudger or a fingernail to disconnect the two lower display connectors by prying them straight up from their sockets on the logic board.
To reconnect these cables, press down on one end until it clicks into place, then repeat on the opposite end. Do not press down on the middle. If the connector is even slightly misaligned, the connector can bend, causing permanent damage.
If you have a blank screen, white lines on the display, or partial or complete lack of touch response after reassembling your phone, try disconnecting and carefully reconnecting both of these cables and make sure they are fully seated.
Disconnect the front panel sensor assembly connector from its socket on the logic board.
This press connector should also be reconnected one end at a time to minimize the risk of bending.
Step 6: Remove the Wi-Fi diversity antenna
Remove the three screws securing the L-shaped bracket next to the Taptic Engine:
One 1.3 mm Y000 screw
One 2.6 mm Phillips screw
One 3.5 mm Phillips screw
Use an opening pick to gently separate the adhered portion of the antenna flex cable from the top surface of the speaker.
This portion of the flex cable is lightly adhered in place. If necessary, apply a little heat from an iOpener or hair dryer to soften the adhesive. This makes it easier to separate (and re-adhere) the flex cable safely.
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.
Reconnecting this cable can be tricky. Make it easier by using your tweezers to hold the flex cable so the connector aligns with its socket. Then, gently press down on the connector with the flat of your spudger until it clicks into place.
Step 7: Remove the Taptic Engine
Remove the three screws securing the Taptic Engine:
Two 1.5 mm Phillips screws
One 2.4 mm standoff screw
Standoff screws are best removed using a standoff screwdriver or bit.
In a pinch, a small flathead screwdriver will do the job—but use extra caution to ensure it doesn't slip and damage surrounding components.
Step 8: Remove the battery adhesive
The iPhone 8 Plus's battery is secured by four pieces of stretch-release adhesive—two at the top, and two at the bottom.
Each piece of adhesive has a black pull-tab at the end, which is lightly adhered to the front surface of the battery.
Peel back the first battery adhesive tab from the bottom right edge of the battery.
If possible, use your fingernails or blunt tweezers. Be careful not to poke the battery with any sharp tools.
Try to keep the adhesive strips flat and unwrinkled during this procedure; twisted or wrinkled strips will stick together and break instead of pulling out cleanly.
Additionally, do not press down on the battery as you pull the strips. Pressing on the battery creates pressure points that can snag and break the adhesive.
Slowly pull one battery adhesive tab away from the battery, towards the bottom of the iPhone.
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.
The strip will stretch to many times its original length. Continue pulling and re-grab the strip near the battery if necessary.
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.
If any of the adhesive strips break underneath the battery and cannot be retrieved, try to remove the remaining strips, and then proceed as instructed below.
Repeat the above steps to remove the remaining three adhesive strips.
Be sure to hold onto the battery as you remove the final strip, or it may fling out of the iPhone unexpectedly.
If you removed all of the adhesive strips successfully, skip the next step.
If any of the adhesive strips broke off underneath the battery and could not be retrieved, continue with the next step below.
Step 9: Remove the battery
If any of the adhesive strips broke off and the battery remains stuck to the rear case, remove it by adding a few drops of isopropyl alcohol (90% or greater) underneath the battery near the stuck strip(s). After about a minute, gently lift the battery.
Don't try to forcefully lever the battery out. If needed, apply a few more drops of alcohol to further weaken the adhesive. Never deform or puncture the battery with your pry tool.
If you choose to use pry tools to lift the battery out of the iPhone, use extreme caution or you may damage the ribbon cables or the wireless charging coil directly underneath the battery.
If the battery remains stuck to the rear case, prepare an iOpener or use a hair dryer to heat the rear case directly behind the battery. This will help soften the adhesive.
Heat the iPhone until the rear case is slightly too hot to comfortably touch. Don't overheat the iPhone, or you may accidentally ignite the battery.
Alternatively, thread a strong piece of string (such as dental floss or a length of thin guitar string) underneath the battery.
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.
To protect your fingers, wear gloves or wrap the string ends around a tool (such as the two screwdriver handles shown in the image).
Remove the battery from the iPhone.
If your replacement battery came in a plastic sleeve, slide off and remove the sleeve before installation.
If there's any alcohol solution remaining in the phone, carefully wipe it off or allow it to air dry before installing your new battery.
Before you adhere the replacement battery, temporarily reconnect the battery connector to the logic board socket. This ensures that the battery is properly aligned in its recess.
Adhere the battery, disconnect it, and continue reassembling your device.
If your new battery doesn’t have adhesive preinstalled, refer to this guide to replace the adhesive strips.
Perform a force restart after reassembly. This can prevent several issues and simplify troubleshooting.