Battery drain even after replacement.

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iPhone 5

Apple发布于2012年9月12日的第六代iPhone，维修时与前代型号一样，需要螺丝刀和撬棒。iPhone 5以多种版本销售：通讯制式有GSM/CDMA；存储容量有16/32/64G；颜色有黑/白。

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alexjakob @alexjakob

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发帖于: 2015年5月25日

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Battery drain even after replacement.

So I`ve changed my old battery to iFixit battery, but battery still drains like 1% per min when using. So I`ve heard about U2 chip, but my phone charges normal and when i`m drained battery empty i can charge it. I`ve minimalized usage as possible, but nothing changes.

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guys? its u2 or what?

由 alexjakob 完成的 2015年5月25日

before replace the battery is there any fault? did your previous battery had same fault?

由 Buddhika Mahesh 完成的 2015年5月25日

previous battery had 527 cycles and power iBackupbot showed 700MAh from 1420MAh so i that needed replacement. Phone have not been any water damage or so. Always charged with apple charger who came in package.

由 alexjakob 完成的 2015年5月25日

I tried reseting settings, reseting all software, even downloaded iOS 8.4, no changes.

由 alexjakob 完成的 2015年5月25日

so what is it then?:(

由 alexjakob 完成的 2015年5月25日

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3个答案

before replace the battery is there any fault? did your previous battery had same fault? — Buddhika Mahesh
previous battery had 527 cycles and power iBackupbot showed 700MAh from 1420MAh so i that needed replacement. Phone have not been any water damage or so. Always charged with apple charger who came in package. — alexjakob
I tried reseting settings, reseting all software, even downloaded iOS 8.4, no changes. — alexjakob

Buddhika Mahesh @buddhikamahesh 声誉积分: 15.1千 13 39 16 · Answer 1 · 2015-05-25T23:19:55-07:00

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Buddhika Mahesh @buddhikamahesh

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1) Before touching U2 check below steps

Turn off all connectives such as Wi-Fi, BT, Mobile data and check whether any improvement of battery life
Again restore via iTunes and setup as new device ( check the device before restore the all contents of your iCloud and apps)
if above steps not worked for you,

1) Remove insisting battery

2) cut off Old battery contact wire with doc connector

3) Connect Voltage(V) and power(A) analyzable power supply (make sure + and - correct)

4) Tune voltage to 4.0V

5) Turn on the phone pressing power key and measure taking current (mA) and it should be around 5mA to 1140mA if power taking beyond 1500mA your logic board having some kind of short circuit.

let me know the result. there is few steps to check in logic board

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Tried first steps, no results, same thing.

Where do I get analyzable power supply? Can I buy it? I don`t think I have one.

Thank you.

由 alexjakob 完成的 2015年5月26日

And one more thing, phone standby can sit like 3 days if I`m not using it, when I start using rapid battery drain, also I can listen to music, battery works fine with no drains, as soon i unlock it and start even texting drains start, phone is cool and not hot.

由 alexjakob 完成的 2015年5月26日

Maybe I should dissamble it and put back together? That would change anything?

由 alexjakob 完成的 2015年5月26日

its a variable power supply

由 _Z_ 完成的 2015年5月26日

Hello alexjakob,

you no need to worried about your motherboard or other components. as you said battery drain without hot.(According to basic physics theories :-) ) fault coming from your battery. if you have battery analyzer you can check the capacity of battery otherwise replace it

由 Buddhika Mahesh 完成的 2015年5月26日

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