Released on September 19, 2014, this 4.7" screen iPhone is the smaller version of the iPhone 6 Plus. Identifiable by the model numbers A1549, A1586, and A1589.

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If my U2 IC Chip is broken, does charging the phone damage it more?

Does charging the phone while having a broken u2ic chip make the problem worse?

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I am surprised that it would still power on with a "Broken" U2 IC. Is it physically broken or do you just think it may be? What are the symptoms you are having>

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Battery draining after it charges, random battery drain with a new battery

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to eliminate the charging circuit you should use a multi meter to measure for charging voltage at battery connector...but sounds like either bad battery, charging port or Tigress/or U2.

Here is a link for testing:

https://www.youtube.com/watch?v=Konvdpt4...

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