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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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Why is phone hot when charging/in use and losing charge rapidly?

iPhone 4 model A1332

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About 2 weeks ago, I noticed my phone getting VERY hot in the upper right corner when looking at the screen. Battery takes hours to charge, often never actually reaching 100%. Charge is depleted with very minimal use. The phone is hot when charging and when in use. Cools down some if idle.

I have ensured no apps are running in the background. I purchased two batteries from different sources at the same time to possibly prevent receiving a bad battery and having to await replacement, etc. Also purchased a new charger.

I changed the battery x1 with no significant change. I then deleted email accounts after reading that this provided resolution for some, reset network settings, turned off cellular data, and put in airplane mode.

Still no significant change. I did get a 100% charge ONCE after first battery change but was depleted in less than 2 hours.

I have just installed the second battery. It was at 20% when I turned the phone on. Within 10 minutes it was at 16%. I have placed it on the charger and waiting.

Any idea what is going on? So frustrating! I am at a loss.

Thanks in advice for any insight!

Answer this question I have this problem too

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I see this in many water damaged phones and it's a problem with the motherboard

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2 Comments:

I have had this phone since June. Moisture sensors were intact/unchanged when I bought it and still are. No problems with the phone prior to this and it hasn't been exposed to moisture since I have had it. What are my options to determine if it is the motherboard? I can't really afford to buy another phone at the moment but sounds like it may be just as expensive to troubleshoot this one.

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If you have changed battery and charging port then that's all the troubleshooting you can do.. If you had another iPhone 4 that is going good then use you motherboard in that frame and see if it still drains if it does it's a board problem

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