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Repair and disassembly information for the second-generation iPhone SE that was announced and released in April of 2020.

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iPhone dies at 50% turns back on with 10%

My SE has been dying at 40-50% but when I plug it in to turn it back on, it says I have 10% battery.

A restore did fix this for a couple of weeks but it is happening again.

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I would recommend that you follow the steps in this article to calibrate the battery algorithm.

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The issue with this method is that it says the phone has to be off when you plug it in and then you let it charge to 100 while it’s still turned off.

My phone will be dead, but when I plug it in, it automatically turns on and shows it at 10%.

I will look into it

Just continue letting it charge until it gets to 100%, Tell me if that works.

Doesn’t work. Phone dies at 50% still. Going to get it replaced via Apple care +

That was what i was going to suggest next.

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I would suggest battery replacement, During a battery's lifetime it's peak voltage and capacity decline. The charge sensor is not built to register the decline in power and after around 2-5 years the battery cannot provide the required voltage, causing the phone to power off. After this, because of the voltage decline (how batteries percentages are measured) the phone assumes that it has much less charge than than it actually contains

Hope This Helps :)

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