Here’s Why Your iPhone Stops Charging at 80%

Aside from broken screens, charging issues are the most common problems iPhone users face. This is understandable because the battery in your iPhone—or any smartphone, for that matter—is one of the several components that inevitably degrade over time.

If your iPhone is not charging above 80%, don’t assume that it’s time to get it replaced. It might just be the device resisting charge due to a software feature that’s turned on by default. Let’s see what it is, why it exists, and how you can charge your iPhone to 100%.

Why Does My iPhone Stop Charging at 80%?

If your iPhone stops charging at 80%, it’s most likely due to a feature Apple introduced in iOS 13 called Optimized Battery Charging. It aims to prevent over-stressing the battery and hence extend the battery life of your iPhone by limiting the charge to 80%.

How Optimized Battery Charging Prolongs Your iPhone’s Lifespan

Most of us try to keep our phones as charged as possible, but this harms your phone’s overall lifespan because lithium-ion batteries degrade faster the more imbalance they hold.

In other words, the longer your battery remains fully charged or empty, the shorter its total charge capacity will become. If you charge your iPhone overnight, that means it remains at 100% charge for hours on end. This is bad and will accelerate battery aging.

To fix this, the Optimized Battery Charging feature on your iPhone prevents it from charging past 80% to reduce some of that stress. Your iPhone learns your usage patterns and delays 100% charging until moments before you wake up in the morning.

This way, the device gets fully charged when needed without sitting at full charge all night. As a result, it helps maintain your phone’s battery health and prolongs its life.

How to Turn Off Optimized Charging on Your iPhone

If you’re running iOS 13 or later, Optimized Battery Charging will be enabled by default on your iPhone. But if you’d rather charge your iPhone to 100% every time, you can easily disable this feature in the battery settings.

So, follow these steps to turn off Optimized Battery Charging on your iPhone:

  1. Go to Settings > Battery > Battery Health.
  2. Toggle off Optimized Battery Charging.
  3. Select from one of the two options: Turn Off Until Tomorrow or Turn Off (permanently).

If you own a bigger iPhone, such as the iPhone 14 Pro Max or iPhone 14 Plus, we recommend not turning off Optimized Battery Charging because the devices already have great battery life, even if not fully charged.

Maximize Your iPhone’s Battery Health

Your iPhone’s battery will inevitably become bothersome after about three years. But if you take care of the battery, which is perhaps the fastest-degrading component, your phone will age slower and last longer, and you won’t have to bother upgrading sooner than you want.

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