Why on iOS 13, Apple only charges iPhone battery up to 80%?
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Why on iOS 13, Apple only charges iPhone battery up to 80%?


iOS 13 helps iPhone save battery power by only charging to … 80%

Apple's next-generation mobile operating system version, iOS 13, which is expected to be widely released to all users by mid-September, will be incorporating a simple technique to help iPhone's cell phone battery. You can "live" longer: it will not charge the battery to the maximum.

In the list of new features of iOS 13, Apple mentioned a term that is "battery optimization". Specifically, the company explained this function "will slow down the battery condition by minimizing the number of times your iPhone is fully charged. The iPhone will "learn" your daily charging habits, which will only charge your phone more than 80% when it finds you need more batteries for long-term use."

The iPhone knows about your work schedule and daily activities, from when you come home from work until you go to bed. Thanks to this information, it can predict when you will plug in your phone for a long time without using 100% of the battery.

In fact, if you (like many other smartphone users) plug in the charger overnight, the device will only charge the battery to a moderate level and stop during your sleep. During the time you wake up and work, it will fully charge the battery to 100%.

Why will charging just over 80% help extend battery life? This is related to the "bottle" mechanism of lithium-ion batteries, or Li-ion batteries, over time. These batteries (used inside the iPhone phone and most other electronic devices on the market at the present time) will be bottled gradually over each charging cycle. They can only charge and discharge certain times only.

When you plug in your phone continuously for a long time, they don't simply charge up to 100% and stay there. Instead, the phone uses energy from the battery to maintain contact with the surrounding mobile broadcast columns and many other small background tasks. These tasks will "discharge" a little of your battery (though very small), and your battery will keep charging a bit and then rinse a bit, repeating it again if you keep plugging in the charger after the battery is full. This will waste battery charge and discharge cycles and reduce battery life. Besides, plugging in the battery when the battery is full also makes your battery heat up. Li-ion batteries "don't like" this, because they have many other potential risks.

"I will not go to sleep and let the phone plugged in overnight,"Associate Professor K.M. Abraham, works at Northeastern University, Boston State, USA and is one of the pioneers in Li-ion battery technology."I will only charge up to 80 or 90%, then unplug the charger."

"You can imagine this is like taking a cup and constantly filling it up to the top of your cup for a long time,"James Dickerson, director of science for the site Consumer Reports compare. "At some point, the cup mouth will wear off, and the cup can't hold as much water as it originally did, just as the battery can't keep as much energy as it was when it was new. more. And that's how the battery gradually gets "bottled"."

According to experts, Li-ion batteries will work best when being charged from about 40% to 80% of its capacity. In perfect conditions, we should charge the phone up to 80% of the battery, unplug it, use it and recharge it when the capacity drops to about 40%. Thus, Apple's battery optimization feature will prevent you from charging up to 80% of the "upper limit", but of course it can't help you find the power outlet yourself to plug the charger in when the battery falls below " lower limit "is 40% okay!

This is not the first time Apple has sought to solve the iPhone battery life problem. At the end of 2017, the company decided to reduce the battery price by 50 USD, down to only 29 USD, after the company was reacted by users because it deliberately reduced the performance of the phones that were pinned to prevent prevent the device from being "accidentally shut down".

Although iOS 13 must be released in mid-September, some iOS apps including Battery HD + and Charge Alarm Pro have provided similar features. On the Android side, the Accu Battery app has also been equipped with a function that helps prevent the battery from overcharging. However, we still have no testing conditions, so we cannot determine the effectiveness of these applications.

In addition, to help extend phone battery life, you should make a habit of implementing some tips that have been instructed by VnReview, such as not leaving the phone long in the sun, or in a car into a hot day. Temperatures above 35 degrees C for long periods of time can cause permanent damage to your phone's battery.

So just charging up to 80% will help extend battery life longer, so why haven't phone manufacturers integrated Apple-like features into all of their product lines long? The answer is simple: Phone batteries are often used more during the day, and battery life is always a top priority for most smartphone users.

"Phone makers are not interested in how long the device battery life lasts by making them "cram" for another 2 hours of use on the battery,"In the past, prolonging battery life could be considered a benefit for phone manufacturers, because of the contract with the carrier, on average, users use it," Abraham said. The phone will usually be upgraded after about 22 months of use, the phone battery will not be "bottle" at the time.

However, user habits are gradually changing. Market research firm Kantar Group said that over the past few years, users' waiting periods for phone upgrades have been around for about two months. On average, users usually come to the next model about 24.1 months.

There are many possible reasons for this situation. In addition to the "downturn" of a two-year contract model with carriers, features such as large screens, beautiful bright displays, high-quality, waterproof cameras have become the standard that most models have. (both flagship and mid-range) have owned for a few years now. Not to mention, some changes, such as the removal of the 3.5mm headphone port, make many people feel dissatisfied and hesitate to upgrade.

Overall, the speed of innovation for smartphone manufacturers is slowing down: The difference between a 2010 and 2012 phone may be immensely large, but the difference between a 2017 and 2019 smartphone seems to be trivial.

Since users tend to use the phone for a longer time, there will be more and more manufacturers following Apple in the future.

"A smartphone manufacturer will definitely consider this issue,"Dickerson concluded."They will lose guests if the quick phone battery "dies" too. Customers will think that is an inherent feature of the phone."

Quang Huy

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