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How iOS 13 Protects Your iPhone's Battery (By Not Fully Charging It)

  iPhone X with charging port.
Kaspars Grinvalds / Shutterstock

Lithium-ion batteries like iPhones have a longer life if you do not charge more than 80%. But to survive the day, you probably want a full charge. With iOS 1

3, Apple may offer the best of both worlds.

iOS 13 is 80% charged and waiting

Apple has announced iOS 13 at WWDC 2019. In the list of additional features was a note about "battery" included optimization. "Apple says it will reduce the time your iPhone spends fully charged. "Specifically, Apple will prevent your iPhone from being over 80% charged until you need it.

You may be wondering why Apple wants to keep your iPhone at 80% charge. It works like lithium-ion battery technology

Lithium Ion Batteries Are Complicated

  The battery image shows that the first 80% charge quickly, the last 20% is a trickle charge.

Batteries In general, are complicated technology. The basic goal is to cram as much energy as possible into as small a space as possible and then safely release that energy without causing a fire or an explosion. "It's juggling with priorities."

Lithium-ion batteries do Things are even more complicated as they are rechargeable.Earlier rechargeable technologies suffered from the memory effect – essentially, batteries lost their maximum capacity when you put them down h only partial discharge constantly recharge. Lithium-ion batteries do not have this problem. If the battery is still empty before charging, stop it. They damage the health of your battery.

RELATED: Exposing the Life of Batteries for Mobile Phones, Tablets, and Laptops

You should not keep the battery at 100%

<img class = "wp- image-423476 size-full "data-pagespeed-lazy-src =" https://www.howtogeek.com/wp-content/uploads/2019/06/battery-cycles.png.pagespeed.ce.oKFFrrqqep.png " alt = "A charge that displays the exhaustion cycle and now expires at 75% and later at 25% equals 1 cycle, even if you're charging between charges. Apple

Lithium-ion batteries grow up to 80% % faster than previous battery technologies, and for most people, 80% is enough to survive the rest of the day, so you get what you need faster, and there's no dreaded "memory effect" that causes the battery loses its full capacity.

Instead of a memory problem, Li-Ion has a problem with the maxima charging cycle. You can only charge the battery until it loses capacity. Not only does it count from zero to 100% as full charge. If you charge 80 to 100% on five consecutive days, these 20% add up to a "full charge cycle".

Not only does the battery discharge to zero and then charging to 100% will damage your battery. In the long run, it is not good to always charge the battery. If you stay close to 100%, there is a risk that the battery overheats (which can lead to damage). To prevent the battery from becoming overcharged, the charging process is interrupted for a while and then restarted.

If you charge the device overnight after it reaches 100%, it will drop to 98 or 95% and then charge. Save up to 100% and repeat the cycle. You use your maximum charge cycles without actively using the phone.

The Solution: The 40-80 Rule

For all these and other reasons, most battery manufacturers recommend the "40-80 Rule" for lithium ion. The rule is simple: Try not to over-discharge your phone (less than 40%), which can damage the battery, and try not to keep your phone fully charged (more than 80%) all the time ,

Both scenarios are worsened by the weather. So if you want your battery to keep its full capacity for longer, keep it at about 80%.

iOS 13 Sits at 80% during the night

 iOS battery screen in the settings

Recent iOS updates include a battery health feature that allows you to check the battery life and the course of your battery Battery consumption. The feature is a useful way to see if you've stuck to the 40-80 rule.

However, Apple knows that you do not want to start the day by 80%. If you travel a lot or are otherwise out of the reach of a retail outlet in some other way, this additional 20% can easily make the difference if your iPhone makes it to the end of the day. If you stay at 80%, you risk losing a valuable asset, your phone. That's why the company wants to get to know you in the middle.

In iOS 13, a new charging algorithm keeps your iPhone 80% charged when charging overnight. This algorithm determines when you usually wake up and start the day, and restarts the charging sequence so that the battery is fully charged when you wake up.

That means your iPhone will not charge you all night, which it does not. It is not necessary (and there is a risk of overheating), but at the beginning of the day the battery should be 100% charged. It's the best of both worlds to give you as long a battery life as possible to get the full capacity of your battery and keep it healthy all day long Health

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