The number of complete charge cycles for the phone changes. How many recharge cycles can a MacBook Pro (Air) battery withstand?

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Now we will learn how to look at the wear level of the iPhone battery and the number of charging cycles. This information will let you know how long your phone will last and when to decide to replace the battery.

This article is suitable for all iPhone 11/Xs(r)/X/8/7/6 and Plus models running iOS 13. Older versions may have different or missing menu items and hardware support listed in the article.

We look at the level of battery wear in iOS 12 and later

Go to "Settings" - "Battery" - "Battery Status" and we are interested in "Maximum capacity".

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The example shows that the battery has 93% of its original capacity. Those. wear is 7%.

We look at the number of iPhone charging cycles on a Windows or Mac computer

To do this, we will use the iBackupBot application. We follow the instructions:

Install the program and connect the iPhone to the computer.
Select the connected gadget in the “Devices” menu.
Click on the line “More Information”, where we look at the number next to the inscription “CycleCount”. The number of recharge cycles completed is indicated there.

Below you will see other useful data about your iPhone’s battery:

BatteryCurrentCapacity – battery wear level.
FullChargeCapacity – actual capacity after the full charging process.
DesignCapacity – capacity according to the passport.

Battery life on iPhone

All Apple gadgets use a Li-ion battery. Everyone has lithium-ion batteries It has its own life cycle, measured by the number of charging cycles.

All generations of iPhone batteries are designed to last approximately 500 charge cycles. It turns out that in total the device should be discharged by 50 thousand percent. One charging cycle is 100%.

For example, if you discharge your iPhone to 25% in one day, then charge it overnight, and start using it again in the morning, then one cycle will end after reaching 75%.

If you do the math, 500 iPhone charging cycles is approximately 1.5 - 2 years of daily use of the gadget. After this time is completed, the battery loses approximately 20% of its capacity and becomes more vulnerable to temperature changes, which is why the iPhone begins to turn off even at 25% of the charge.

When the 1000 cycle mark is reached, the iPhone battery capacity is already reduced by up to 50%. On average, such an indicator is achieved within 3–4 years of using the gadget. This period is best suited for replacing the battery, since with 50% capacity when the screen is on, the iPhone will hardly be able to work for 2–3 hours.

If you purchased a gadget on the secondary market, it is important to find out the condition of the battery. To do this, you need to look at the number of charging cycles.

Charge your iPhone battery correctly

It is not recommended to bring the charge level to 100%. If possible, it should be kept in the region of 20 – 80%. This way, you won’t “overstress” the battery cells, and recharge cycles will be slower.
There is one exception to the previous rule. It is useful to completely discharge your iPhone to 0% once a month, and then charge it to 100%.
There is no need to leave the iPhone to charge overnight - the electrons in a lithium battery must move, which does not happen when connected to a power outlet for many hours.
Avoid extremely cold and extremely hot temperatures. Batteries “love” the temperature, which is 15 degrees Celsius.
No need to buy for iPhone cases with wireless charging. Wireless charging itself creates excess heat, which harms the battery.

It is very important to know the number of charge cycles of your MacBook’s battery, at least because you will not be very pleasantly surprised when the battery suddenly “decides to live for a long time.” Well, or when buying a used laptop, they won’t be able to deceive you, and they won’t slip you a “dying” battery.

Now we will tell you how to protect yourself from such problems and find out all the information about your battery.

How to find out the number of battery charge cycles on a MacBook:

- First of all, open “About This Mac”, select “More”, “System report” and then “Power”.

What is a charging cycle? The charging cycle involves using the battery's full charge. However, many of us do not wait for the device to turn off and constantly recharge it. Well, for example, you discharged your laptop by 50% and charged it, as soon as your device discharges another 50%, the battery will be considered to have completed one cycle. That is, the cycle may include several recharges.

After each completed cycle, the battery capacity decreases slightly. For example, batteries that are used on Apple equipment lose no more than 20% of their capacity within a sufficient period of time. large number charging cycles.
More detailed information You can see about Apple computer batteries

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Doesn't it already need to be replaced?..

iOS devices are equipped with a built-in lithium-ion ( Li-ion) battery with polymer electrolyte ( Built-in rechargeable lithium-ion battery).

The maximum "life" of a Li-ion battery is achieved when the charge is limited to 95% and the discharge to 15-20%. This operating mode is automatically supported by the monitoring and control system BMS(), which is included with any lithium-ion battery.

The batteries are charged via a USB port or from a USB power adapter ( Apple USB Power Adapter).

iPhone/iPod power adapters provide an output voltage of 5V and a current of 1200mA.

iPad power adapters provide an output voltage of 5.1V and a current of 2100mA.

Big-Brother-Apple-Stub guarantees that a properly maintained iPad battery will retain at least 80% of its original charging capacity after 1000 full charge cycles ( complete charge cycles).

An iPhone battery should retain at least 80% of its original charge capacity after 500 full charge cycles.

The iPod battery should retain at least 80% of its original charge capacity after 400 full charge cycles.

How to find out the number of completed charge/discharge cycles of your iOS device's battery?

This information is stored by the iOS device, but there is no direct access to it.

To do this you need to use, for example, iBackupBot:

– install following the installer’s instructions;

- run ;

– connect to your iOS device;

– in the section Devices select your iOS device;

– in the section Battery in the window that opens, find the line CycleCount.

It can be seen that the iPhone battery capacity after 712 full charging cycles is almost 84%. This is within normal limits.

Notes

1. The operating principle of the battery is based on the reversibility of a chemical reaction. The performance of the battery is restored by charging - by passing an electric current in the direction opposite to the direction of the current during discharge.

2. The maximum possible useful charge of the battery is called the charging capacity, or simply capacity. Battery capacity is the charge given off by a fully charged battery when discharged to the lowest permissible voltage. Battery capacity is measured in pendants, in practice, an off-system unit is often used - Ampere-hour. 1 A h = 3600 Cl.

3. There is a term energy capacity, is the energy given off by a fully charged battery when discharged to the lowest permissible voltage. INit is measured in Joules, in practice, an off-system unit is often used - watt-hour. 1 W h = 3600 J.

4. The energy capacity of iOS device batteries is different, for example:

– iPad 2 – 25 Wh (6757 mA h; – 3.7V);

– iPad 4 – 43 W h (11622 mAh;– 3.7V);

– iPhone 4S – 5.3 W h (1432 mAh;– 3.7V);

– iPhone 5 – 5.45 W h (1434 mAh;– 3.8V).

Useful information.

There are many instructions on the Internet that describe the process of determining the number of cycles recharging iPhone and iPad. However, almost every one of these articles talks about a method that requires a Mac to use. But this is an optional requirement. You can find out the number of recharge cycles for iPhone and iPad, and determine whether it’s time to think about replacing the battery on a computer under Windows control.

Step 1: Download and install the utility iTools to a computer running Windows. Important! For proper operation iTools must have iTunes installed on your computer, download current version which can be found on Apple official website.

Step 2: Launch iTools and connect your iPhone or iPad to your computer using a USB cable.

Step 3. Wait until the device is detected in the program.

Step 4. Click on the button with the image of a battery, which is located under the device.

Step 5. In the column FullCycle Information will be provided on the number of recharge cycles for the iPhone or iPad.

Also in the menu that opens, you should pay attention to the columns Actual Capacity And Design Capacity. They indicate the current and declared battery capacity, respectively. In other words, Design Capacity- the battery capacity of the device in a new state, and Actual Capacity- the capacity that the iPhone or iPad currently has.

Currently, smartphones and tablets use lithium-based batteries and lithium-polymer batteries.

Each of them has its own resource, which depends on the correct charging and operating conditions. There is also the concept of a “charging cycle” - today we will find out what it is.

What is a charging cycle?

The charging cycle is a set of processes associated with filling the battery with energy and completely discharging it. Their number determines how many times the battery can be charged and discharged.

There is no exact data on the number of cycles for lithium batteries, as these numbers may vary depending on proper use. On average, the resource of such batteries is 600-800 pieces. This figure may seem small to some, but if we assume daily charging and discharging, then 800 cycles - 800 days, that is, more than two years.

How many charge cycles are left?

Let’s imagine a situation where within two days the phone was discharged by 50% both times and was required to be charged to 100%. In this case, 1 charge cycle was used. Such moments can be repeated regularly, which leads to slower depletion of cycles and extends battery life. For this reason, many experts recommend not waiting for your smartphone to be deeply discharged and charging it regularly.

There is a relationship between the remaining energy in the battery and the number of cycles. Remaining charge level, % - remaining number of cycles:

90 - 4700.
75 - 2500.
50 - 1500.
0 - 500.

The table shows that if you discharge your smartphone by 50% every day, the number of charge cycles will be about 1500.

What's the best way to charge your smartphone?

It is important to understand that you cannot keep a fully charged smartphone constantly connected to a charger, for example. No, overcharging will not occur, since the charging controller will stop the flow of current, but a constant drop in the energy reserve to 99% and the subsequent replenishment to 100% will lead to a decrease in the number of charge cycles.

Recharging the battery, which occurs under the control of the user, has proven itself best. As soon as 90-100% is reached, you need to disconnect the gadget from the network. Of course, in everyday life It is difficult to ensure ideal operating conditions for the battery, but we must try to follow.

The following factors influence the reduction in the number of possible battery charge cycles and the reduction in its capacity:

battery overheating;
regular depletion of charge to 0%;
use of non-original charger ().

Even if you manage to extend the life of the battery by 2-3 years, the natural aging of its constituent elements will still lead to a decrease in capacity by 15-20%.