My iPhone battery always dies at 10%. No warning. Just goes.

Question

Level 1

102 points

My iPhone battery always dies at 10%. No warning. Just goes.

I read about how to check for your battery's health, and it says "Maximum capacity 81%".

And optimised battery charging is enabled.

But surely it should still warn when it is technically "low". I was replying to a message and it went dead. I plugged it in and it was on 10% after it booted up again.

It's becoming a problem! As you get no warning, because of course 10% is the warning level.

What can I do that won't cost me an Apple Fortune?

Simon

iPhone 7, iOS 14

Posted on Jul 27, 2021 2:21 AM

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Answer 1

LD150

Level 10

104,438 points

Jul 27, 2021 5:49 AM in response to simon_a6

If a battery is sick then neither the health nor the remaining charge can be relied upon.

One thing you can try that is no longer recommended, (but you can't do any more damage) is:

Charge to 100% and leave on charge one extra hour.

Run it down using bright screen on no lockout and flash light til it goes off then leave one hour.

Charge to 100% and leave on charge one extra hour.

Take off charge and immediately Force restart the phone

forced restart

https://support.apple.com/en-gb/guide/iphone/iph8903c3ee6/ios

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Answer 2

LD150

Level 10

104,438 points

Jul 27, 2021 2:33 AM in response to simon_a6

Get a new battery fitted by apple for $£49 or $£69 while you wait.

https://www.apple.com/retail/geniusbar/

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Answer 3

Jul 27, 2021 2:34 AM in response to simon_a6

It is probably a bug. Try upgrading to a new iOS version. If the problem still around, reply

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Answer 4

LD150

Level 10

104,438 points

Jul 27, 2021 5:33 AM in response to Joel_Media22

It's more likely a tired out battery 81% is right on the threshold for replacement anyway..

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Answer 5

simon_a6 Author

Level 1

102 points

Jul 27, 2021 2:41 AM in response to Joel_Media22

Yeah there is an upgrade available actually, so running it now.

surely if it has lost 10% of its cell usage, it should still go down to 1% of its "available usage".

I'll update it all and respond back here after, to see what happens.

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Answer 6

simon_a6 Author

Level 1

102 points

Jul 27, 2021 5:40 AM in response to LD150

Oh I get that. What I don't get is why the 'battery level' shows 10% and then dies. Surely it is 10% of whatever is left. Not that "10%" which is in fact dead, so useless... so when you reach that minimum level it just dies anyway.

That doesn't make sense.

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Answer 7

Jul 27, 2021 2:42 AM in response to simon_a6

Of course

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My iPhone battery always dies at 10%. No warning. Just goes.

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