How to Stop Overcharging Your iPhone 15 (and Why It's Important)

You can set your iPhone to stop charging at 80%, but it's not necessarily a good idea.

How to Stop Overcharging Your iPhone 15

With the iPhone 15, Apple added a handy feature that lets you limit how much your battery charges, stopping at 80%. In this article, we'll explain what it does, how to turn it on, and share a good reason why you might not want to use it.

What Does the iPhone's 80% Charging Optimization Do?

Many smartphones offer a feature that lets you limit charging to around 80-90% overnight and then finish charging just before you unplug the phone. This is done to help the phone's battery last longer because leaving it at 100% on the charger for many hours can be bad for the battery's health.

Apple has taken this a step further with the iPhone 15 series. They now have a new option called Charging Optimization, which means your battery will never go above 80% charge, no matter what. This is in addition to the existing feature called "Optimized Battery Charging" that they introduced in iOS 13 back in 2019.

In a helpful document from Apple, they say, "When you pick the 80% Limit option, your iPhone will charge up to roughly 80 percent and then stop charging. If your battery drops to around 75 percent, it will start charging again until it reaches about 80 percent. When you use the 80% Limit setting, your iPhone will sometimes go all the way to 100 percent to keep track of the battery's status correctly."

How to Limit Charging on the iPhone 15

If you want to never change your iPhone past 80% capacity, it only takes a few seconds to flip the switch.

1. Open the Settings app (use Siri if needed) Then Search for Battery 

How to Limit Charging on the iPhone 15

2. Go to Battery Health & Charging.

How to Limit Charging on the iPhone 15

3. Select Charging Optimization.

How to Limit Charging on the iPhone 15

4. Choose the 80% limit option.

How to Limit Charging on the iPhone 15

Your iPhone will now stop charging when it reaches 80% capacity most of the time. However, it will still charge up to 100% sometimes when it needs to check the battery. If you want to go back to the normal way of charging, you can do that by going to the same menu and choosing "Optimized Battery Charging" instead of "80% Limit."

You can also choose "None" if you want your iPhone to charge all the way to 100% whenever you plug it in. This might be the best choice if you find that your phone isn't fully charged in the morning or if you usually charge it overnight.

Is It Better to Charge Your Devices Up to 80%?

Is it a good idea to use the new charging limit feature? Well, for most folks, it might not be necessary. This feature is meant to help the phone's battery last longer by avoiding charging it to the very end, which can make the battery get hot and wear out faster. But here's the thing: thanks to the existing battery optimization tech that's been around for a while, most people only lose a small amount of their battery's capacity each year, like around 5-10%.

Now, if you turn on the charging limit feature, you're basically saying goodbye to 20% of your phone's battery capacity right from the get-go. That might mean your phone won't last a whole day if you use it a lot. And if you have to recharge it more often during the day, well, that's still causing some wear and tear on the battery, just not as much as charging it all the way to 100%. So, it's something to think about.

It's important to know that if your iPhone's battery starts getting weaker, it doesn't mean your phone is done for. You can get the battery replaced for around $99 at an Apple Store. Other places like uBreakiFix/Asurion and Best Buy Geek Squad might also offer this service for the newer iPhone models soon.

For most people, it's a good idea to keep using your iPhone normally and only replace the battery when it really starts losing its capacity, which usually happens after about 2-3 years. Instead of intentionally reducing your battery's life by using the feature, it's often better to wait until your battery naturally needs replacing. To put it simply, if you end up replacing your battery every 24 months for $99, it's like paying about $4.13 per month to have a fully charged phone. So, if you're not sure whether to use the feature or not, you might think of it as paying a small monthly fee to have more battery life each day and charge your phone less. And if your battery lasts for 36 months before needing a replacement, the monthly "fee" goes down to about $2.75.

When you view it like this, suddenly deliberately reducing your battery's capacity by 20% doesn't seem like such a good idea. It's nice that there's now a choice for specific situations, but we suggest you not worry too much about your battery's health. It's going to get worse over time regardless of the settings you pick, so it doesn't make sense to tweak your battery so much that you end up enjoying your phone less.

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