Charging your phone to 100% every time you plug it in might seem like the most logical thing to do, but it's not exactly the best thing for your battery. More and more users are choosing to charge their phones to 100% every time. Limit the load to 80% to extend the lifespan of the phone and prevent it from deteriorating so quickly. If you're also tired of hearing the charger alarm or having to constantly monitor the percentage, there are much more convenient ways to do it.
In the most recent iPhone models, such as the 15 series, Apple has added a specific option for the system itself cut the load by about 80% automatically. Older iPhones don't have this feature as such, but you can use apps, alarms, and shortcuts to achieve something very similar. Below you'll see, step by step and in detail, How to limit charging to 80% to protect the battery On different iPhones, what are the limitations of each method, and what other habits help you take care of your battery in the long run?
Why does it make sense to limit the load to 80%?
Modern mobile phone batteries are lithium-ion and, although they are very efficient, They suffer more wear and tear when they spend many hours near 100%.Keeping your phone fully charged at all times, especially if you leave it plugged in overnight, accelerates the loss of capacity over time.
This behavior has a technical explanation: high voltages and high temperatures During full charging, internal chemical reactions occur that degrade the cell's materials. That's why manufacturers, including Apple, recommend avoiding, as much as possible, keeping your phone continuously between 90% and 100% battery if you want it to last for years in good condition.
By reducing the maximum charge level to around 80%, the battery remains within a more comfortable range, with less electrical and thermal stressThe result is that, although you sacrifice some daily battery life, you gain in battery health in the medium and long term. It's a kind of "insurance" so that, over time, the phone doesn't lose as much capacity.
The new 80% charging limit option on iPhone 15
With the iPhone 15 family, Apple has introduced a specific feature that allows natively limit the load to 80%without relying on external apps or strange tricks. This option is available across the entire range: iPhone 15, 15 Plus, 15 Pro, and 15 Pro Max.
The idea is very simple: you activate the limit once and, from then on, the phone It stops charging when it reaches approximately 80%.Even while connected to the charger, for example while you sleep, the battery will remain charged. This reduces the time the battery spends at 100%, helping to preserve its health over charging cycles.
How to activate the 80% charging limit on iPhone 15?
On the iPhone 15, the setting to limit charging is integrated into the battery menus. The process to activate it is quite straightforward, and you only need to do it once for it to be configured.
First, open the app Settings on your iPhone 15 Then, in the list of sections, scroll down until you find the section dedicated to the battery. Once you see it, enter that menu to access all the options related to battery consumption and health.
Within the battery settings, locate the section that refers to the battery status and chargeThis is where Apple focuses on battery performance, health, and additional features. Once inside, you'll see a section related to optimizing or improving charging.
In that submenu you'll find the settings where you can choose how you want the load to be managed. Among those options is the possibility of set a limit of around 80%Select that option to stop the system from charging the battery beyond that point, except in certain specific situations.
It's worth noting that even if you activate the limit, the iPhone may still decide to charge up to 100%This is done to keep the percentage measurement system calibrated and avoid errors in battery health estimates. It's not a phone malfunction; it's an intentional behavior to ensure the battery data remains reliable.
What happens on older iPhone models?
On iPhones prior to the 15 series, Apple It does not include a direct switch. that allows you to automatically tell your phone "don't go over 80%". These models still have features like optimized charging, which tries to learn your routines to maintain 80% overnight and reach 100% just before you wake up, but it's not the same as a fixed limit.
Therefore, if you have an older iPhone and want to limit charging, you'll have to resort to alternative solutions. Basically, it's about getting the phone to... I'll notify you as soon as the level reaches 80%.This allows you to manually unplug it and prevent it from rising further. You can use third-party apps for this, or, if you prefer to keep everything within the Apple ecosystem, create automations with the Shortcuts app.
Use a battery charge alarm app
The simplest and most direct way to monitor the 80% charge on an older iPhone is to install a application that acts as a charging alarmThere are several apps on the App Store that monitor the battery percentage and send an alert when the level you specify is reached.
One of the most common categories is apps like “Battery Health – Charge Alarm” or similar, which allow you to set a target percentage. The way they work is simple: Download the app from the App StoreYou open it and, in its settings, you set the alert to trigger when the battery level reaches 80%.
Within this type of app you can configure not only the percentage limit, but also the alarm sound and notification type that you want to receive. Some allow you to choose more discreet tones, others add pop-up alerts, vibration, or different combinations so you don't miss the moment to unplug your phone.
Once everything is set up, simply connect your iPhone to the charger as usual. When it reaches 80%, the app will sound the alarm or display the notification that you have configured. At that point, you will have to disconnect the phone manually, as the system does not physically cut off the charging.
This method has the drawback that if the app closes or the system leaves it running in the background for too long, the alarm might not sound. That's why many people say that... when the charging is very fast, Keeping track of the alarm can be quite tedious.especially if your phone is far away or you're busy with something else.
Limiting the load with Shortcuts on iPhone
If you don't like relying on third-party apps, or you're worried that the system might suspend them in the background and you won't receive a notification, you can use the native app. Apple ShortcutsWith it, you can create an automation that triggers a notification or sound when the battery exceeds a certain percentage.
The idea is to first add a shortcut to generate the notification and then create a custom automation that runs it automatically when the iPhone is charging. This way, you get a solution integrated into the system itself, with less reliance on external apps.
The first step is to obtain a shortcut that acts as an 80% charge alarmThese shortcuts are typically shared via links that open directly in the Shortcuts app. When you open the link on your iPhone, you'll see a button that says "Get Shortcut" or something similar; tapping it will add the shortcut to your personal library.
Once the shortcut appears in the “My Shortcuts” tab, you need to configure it to perform your preferred notification action. Typically, it's set to display a notification when executed. notification, an on-screen message, or play a sound When the battery percentage reaches 80%, leave the shortcut saved as you need it.
The next step is to go to the tab of Automation within the Shortcuts appThere you can create a new personal automation. When the assistant asks you which event you want to use as a trigger, select the option related to the charger; it usually appears as "Charger" or something similar.
In that section, it indicates that automation should be activated when the loader is connected to iPhoneIt is also recommended to select the option that makes the automation run immediately, without asking for confirmation each time, so you don't have to accept messages continuously.
After choosing the loader condition, the wizard will ask you to add an action. Instead of building a new one from scratch, select the action from “My shortcuts” and choose the 80% alarm shortcut that you had saved earlier. This indicates that, when the loading condition is met, the system can use that shortcut when appropriate.
Once you complete the setup and save the automation, Shortcuts will be ready to send an alert every time you plug in your phone. exceed 80% batteryJust like with alarm apps, cutting off the charge is still manual; you'll have to disconnect the cable when you hear the sound or see the notification.
Limitations of manual methods
Neither alarm apps nor automations with Shortcuts can completely stop the flow of energy towards the battery, since iOS doesn't offer that type of control over apps or shortcuts on older models. What they do is alert you so you can decide to disconnect the iPhone at the appropriate time.
This means that if you are ever away from your phone, forget the notification, or have the volume very low, the phone may still continue ringing. Loading past 80% Even if you have everything configured. Furthermore, with battery saver mode and other internal mechanisms, iOS can limit background activity and affect the behavior of some alarm apps.
Even so, using these systems as a reminder is usually better than nothing, especially if you're already used to leaving your phone plugged in. While you might not get exactly 80% of the time, the simple fact of reduce the time spent to 100% It already helps to make the battery aging somewhat smoother.
Other habits to protect your iPhone battery
Limiting charging to 80% is only part of the equation. If you truly want to take care of your battery, it's best to combine this habit with other recommended practices, which also help. maintain battery health for longer.
One of the most critical factors is temperature. Lithium-ion batteries don't handle extreme heat or cold well. Try to avoid leaving your iPhone in the sun in the car, using it for demanding games while it's charging, or leaving it in a hot, dry place. keep away from heat sources for long periods.
It's also a good idea to limit your phone usage while it's plugged in. If it's plugged in and you're also playing demanding games, making long video calls, or recording video, the device will generate more heat than usual, which This increases stress on the battery.Ideally, let it rest a little while charging, especially if you want it to stay in good condition for years.
Another key point is to always keep your iPhone with you. updated to the latest version of iOS that you have available. Apple usually introduces energy efficiency improvements and bug fixes that directly affect power consumption and how the system manages battery charging and performance.
If you notice that, even with good charging habits, the battery drains very quickly while you're using it or discharges rapidly even if you barely touch the phone, it's advisable to check the settings and see which apps are causing the problem. They are consuming more energy than normalIn some cases, closing problematic apps, disabling background processes, or adjusting notifications can significantly reduce resource drain.
And if it still doesn't improve, there's always the option of having the battery analyzed at an authorized service center. Sometimes, when the battery health percentage drops too low or there's abnormal operation, it's worth considering a... professional battery replacement It can give the mobile phone a much more reasonable battery life.
Managing the charge up to 80%, whether using the built-in feature on iPhone 15 models or by using alarms and shortcuts on previous models, is a practical way to care for the battery without overcomplicating things. Combining this strategy with reasonable use while charging, avoiding extreme temperatures, and keeping the system updated makes it much easier for the battery to hold up over time, preventing you from feeling like your phone is "running out of steam" after a few months. Share this information so other users know how to limit their mobile phone's charging to 80%.