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Repair information and guides for the iPhone 8 that was released on September 22, 2017. Model: A1863, A1905

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iPhone 8 keeps rebooting after Battery Replacement

Hi there,

so I decided to replace my iPhone Battery.

I replaced it because iOS16 is pretty battery-consuming

Everything seemed to be working just fine. The Instruction on this website is really good :)

Put it back together plugged in and -

  • it only starts with power connection
  • keeps rebooting
  • says to plug it in computer, but when I do it shuts down and won´t start again
  • get "restore-screen" sometimes

If you need any more information, just ask :)

Have a good one y´all, peace

Answered! View the answer I have this problem too

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Were you having charging issues before the repair? Or just battery life?

Even without definitive answers to those questions, two things that immediately come to mind. The new battery could be faulty. Even from reputable sources, sometimes this just happens. If you connect the original battery again, does it boot up normally?

Being that you’re getting the restore screen sometimes (but would still be applicable if you weren’t), this could also be damage to the logic board done during the repair. Pry damage is not uncommon around connectors. There are a few components immediately around the battery connector which communicate battery data—how charged the battery is, temperature, etc…. If these became dislodged it could cause behavior like this.

You may be able to tell with your eyes alone, but the components are quite small and it would be better inspected with some sort of magnification. You can see the two mosfets here between the battery and display connector, but those are not the only components that could be to blame, there are other smaller components under the sticker as well

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you could have caused damaged to the logic board removing the old battery or connecting the new 1, it would be difficult to see as the components are very small

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Philip will be eternally grateful.
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