Why iPhone won’t charge up to 100 percent: solution to the problem

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We already subconsciously want to charge our devices to the level of 100% before leaving the power source for a long time. Alas, this mark is not always achievable. At one point, you may find that your iPhone is not charging to the 100% mark. Is it broken or is it something else? Can this situation be corrected? We will tell you why this happens and what you can do.

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The inability to charge the device to 100% is immediately striking. Moreover, sometimes the iPhone’s charging stops at 80% altogether. In fact, there are several reasons for such situations. Let’s find out why suddenly your smartphone stopped charging fully and how to solve this problem.

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Reasons why iPhone won’t charge up to 100%

Activated function “Optimized charging”…
Disabled option “USB accessories”…
There is a problem with the power supply or cable.
Software malfunction.
Hardware malfunction of the iPhone itself.

Now that we know the possible causes of the problem, let’s think about how you can deal with them.

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Disable Optimized Charging

Optimized Charging was introduced in iOS 13. So Apple decided to help extend the battery life of its devices. But it is precisely “Optimized Charging” that may not allow raising the battery charge above 80% (in detail).

How do I turn off Optimized Charging in iOS?

1. Navigate the menu path Customization → Battery…

2. Open the item “Battery status“.

3. Move the “Optimized charging“.

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Turn on the USB Accessories option

If you use a power bank or other external device to charge your iPhone, and the smartphone screen has been locked for more than one hour, charging may automatically stop. To prevent this from happening, set the USB accessories switch along the way Settings → “Face ID and Passcode” (or “Touch ID and Passcode” depending on the device you are using) to Included (in detail)…

Checking the power adapter, cable and port of the iPhone itself

Charging problems can arise from a faulty power supply, charging cable, or even dust trapped in the Lightning port. That is why, if there is a problem with a full charge of the battery, it is worth checking the accessories for obvious damage, and it is corny to clean the port of dirt. But this work must be done carefully, preferably with compressed air. If, upon visual inspection, the cable and adapter do not seem to be damaged, and charging is too slow or does not go at all, then you can try using a different set of accessories. This will help determine if the problem is with your accessory.

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Implementing a hard reboot

If the iPhone doesn’t fully charge, a software glitch could be the culprit. To fix it, you will have to reboot your smartphone.

How do I restart my iPhone?

1. Press and release the volume up button.

2. Press and release the volume down button.

3. Press and hold the screen lock button.

4. When the Apple logo appears on the display, release the button.

I must say that such a reboot method is available only for relatively new models, starting with the iPhone 8 and all subsequent ones. Here’s what to do on older models:

If you have an iPhone 7, iPhone 7 Plus, or 7th generation iPod touch, you will need to press and hold the screen lock and volume down keys while the Apple logo appears on the display.

If you have an iPhone 6s or earlier, you need to press and hold the screen lock button with the Home button pressed while waiting for the Apple logo to appear on the display.

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What if all else fails?

If the above tips did not help you, then the reason may be hidden in hardware malfunctions of the iPhone itself. The problem can affect the power controller, damaged port connectors, a worn out battery, etc. And here at home you can hardly do something. It remains only to contact a proven service center.