Battery drain, overheating with a perfect new battery

I have some complicated issues with the battery in my IPhone 5s. I have it since 2 years and recently the battery was getting worse and worse, I also observed overheating at the back, bottom side. Yesterday my phone died and I was charging it for 8 hours - the only result was that it was stuck on the charging animation and it wouldn’t turn on (It seemed like the port was detecting the charger but it did not charge my phone). So i went to a service and just to check, I plugged in an original charger (recently I was using some non original cheap ones) AND it worked! BUT I was adviced to change the battery and so I did. Now on the battery life app it shows the battery is in a perfect condition but in fact it’s being drained even faster. It goes from 100% to 0% in an hour. What’s funny: I have two chargers (NONE of them is original) and while one is working Ok, the other doesn’t charge my phone at all. What could be a problem? I read something about U2 IC damage but in these cases either the original charger did not work or the phone could not be charged with any charger - which is not the case in my phone. Could you please give me any hint about what could be wrong and how much would I pay to repair it? Thanks!

Respondido! View the answer Também tenho esse problema

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You described the problem very carefully, I think my iPhone has similar issue, I hope I fix it just as you did!

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Igor, yes do the same. Not many people will replace the U2 IC chip, but it is indeed a common issue occurring in iPhone 5. After a week I can honestly say it solved my problem 100%, now the battery is not drained, phone charges quickly and it doesn't overheat. I was observing the analysis of the current in my phone and in one specific place it should not exceed 0,2 A, in my case in was over the limit and after the repair it was around 0,1 A.

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Did you make it by yourself or give it to the professional workshop?

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I gave it to a professional service, unfortunately I don’t have such skills ;)

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Hi, I find your post very helpful, thanks to your problem I've found the solution for my troubles, cheers!

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It was U2 IC chip. Yesterday I fixed it and the phone is back to life. Thank you all! ;))

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It is a common issue in iPhone 5s models, check the solution:

How to resolve quick discharging of the battery in an iPhone 5s

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it could be as you mentioned the charging chip known as tristar that could be causing the drain, prices vary depending on the shop, where are you located and i will look for the closest place to you that does this repair

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I live in Bangkok, Thailand :)

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You should look for the microsoldering workshope there.

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Bangkok has many good workshop to do the job.

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Karolina Andruszkiewicz será eternamente grato(a).
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