I replaced the battery in my old iPhone 4s, but when trying to restore through iTunes, it gives me error 29 and everything I’ve researched indicates that it’s the battery replacement that it doesn’t like. The previous battery was completely dead. The phone wouldn’t even boot. How do we resolve this issue?
Edit: Battery was purchased from ifixit.
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You need to get a battery that has the proper temperature sensing. You could get iPhone 4S Battery from iFixit which should work without issue or the battery from injured gadgets which I can personally verify works fine and is a bit cheaper. https://www.injuredgadgets.com/replaceme...
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I did purchase the battery from ifixit, still doesn’t resolve the error.
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Hello, for the iphone 4 there are different batterys . You must check the old battery and put a battery with the same APN 616-05... (APN stands for Apple Part Number and you can find this on the battery itself) as the old one. When you have done this your phone will work for sure.
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Hi David,
Full disclosure here, I don't work for iFixit but I am a volunteer moderator.
That being said, my first suggestion would be to contact the iFixit Store personnel. Their batteries are warranted for a year and they fixed me right up when I had an issue with an Apple Watch battery. Best way I'm aware of is to email them at support@ifixit.com. Explain the issue and ask what your next step should be.
par Jerry Wheeler