iPhone 5s loosing 30% battery life overnight!

Question

iPhone 5s

2013年9月10日に発表されたApple iPhone 5sの修理情報とガイドです。モデル A1533、A1453、A1457、A1528、A1530、A1518。

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J W @weja

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投稿日: 2018年3月5日

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iPhone 5s loosing 30% battery life overnight!

Hi guys, I have an iPhone 5s here and I’m trying to figure out where the issue lies... it’s loosing around 30% battery life overnight!

Overnight the phone will be left in low power & airplane mode.

background app refresh has also been disabled

*auto brightness is off

It’s currently running iOS 11.2.6

*Has been restored to factory settings. No iCloud, no apps, pictures ect. Literally a fresh install of iOS

multiple new batteries fitted (same result)

im thinking it’s the u2 ic chip that’s failing but I’ve dealt with a few of these before and they will ither drain power much faster than this or shut off randomly (an issue I have not had with this iPhone)

Really stuck! Any help would be greatly apreciated :)

Thanks!

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Ben @benjamen50

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投稿日: 2018年3月5日

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You guessed right, pretty much the U2 Tristar charging chip is the last thing to rule out.

Though shorted cap(s) on the logic board can also cause this kind of issue which will require some time to measure capacitors for any short to ground with a multi-meter and the metal shields removed, which all require micro soldering to do.

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Does this mean the phone is basically stuffed ?

I have the same problem. Should I just ditch the phone & cut my losses ?

Lija Kazlauskas さんによる2018年12月4日

Pretty much, there's a short circuit on the board most likely from the U2 Tristar charging IC chip. IMO too expensive these days to fix for a iPhone 5s for what it's worth.

Ben さんによる2018年12月4日

A 5s that needs a tristar chip is a great device for microsoldering training---if you decide not to fix it, then we are always on the lookout for great student project phones at iPad Rehab for training microsolderers all over the world. The more folks that learn to do board repair means that next time you'll have someone local who can do a straigthforward board repair like this while you wait.

jessabethany さんによる2018年12月4日

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Does this mean the phone is basically stuffed ?

I have the same problem. Should I just ditch the phone & cut my losses ? — Lija Kazlauskas
Pretty much, there's a short circuit on the board most likely from the U2 Tristar charging IC chip. IMO too expensive these days to fix for a iPhone 5s for what it's worth. — Ben
A 5s that needs a tristar chip is a great device for microsoldering training---if you decide not to fix it, then we are always on the lookout for great student project phones at iPad Rehab for training microsolderers all over the world. The more folks that learn to do board repair means that next time you'll have someone local who can do a straigthforward board repair like this while you wait. — jessabethany

iPhone 5s

iPhone 5s loosing 30% battery life overnight!

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