Introduction
This is a prerequisite-only guide to replace the battery in an iPhone 8.
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: Drain it below 10%, then charge it uninterrupted to 100%.
Opening the iPhone 8 will damage the waterproof seals on the display. If you do not replace the adhesive seals, your phone will function normally, but will no longer be water-resistant.
Tools
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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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To reassemble your device, follow the above steps in reverse order.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Check out our Answers community for troubleshooting help.
Be careful prying around the side button connector when trying to remove the top tabs. There is very little room to maneuverer
Tom Millard -
£ Tapes broke on me so I applied iISOPROPYL ALCOHOL using an Eye Dropper waited 30 seconds tHen heated up some oil in the bag rice for 2 minutes on 700W and the applied the unopened packet to the back of the iPhone for 90 seconds.
Themn I used an out of date credit card with the raised numbers facing down to easily release the battery.
David Howard
David Howard -
Great tip! Worked perfectly and easy. Thanks.
Stephen Smith -
It should read heated up some boil in the bag rice
David Howard
David Howard -
Very difficult. be very careful on the limited space end that you don't puncture the battery!
Carl Schultz -
I really hope you guys not to skip steps for detaching taptick engine because it is really hard to pull out string with taptic engine. 4 of 3 strings were cutted when I treid to detach batteries with taptic engine. So, I really recommend you to get rid of taptic engine before you start this step. But if you skipped and strings are cutted, there is a way. Use hair dryer 90 secs as maximum hot behind the battries and detach the batteries. It worked to me.
Min Su Kang -