The number of complete charge cycles for the phone changes. How to Extend iPhone and iPad Battery Life

Let's learn how to determine the number of battery charging cycles Android phone or tablet, as well as determine the degree of physical wear and tear of the battery.

This article serves as a continuation of the previous ones: and.

This article is suitable for all brands that produce phones on Android 9/8/7/6: Samsung, HTC, Lenovo, LG, Sony, ZTE, Huawei, Meizu, Fly, Alcatel, Xiaomi, Nokia and others. We are not responsible for your actions.

Features of modern batteries

Contrary to popular myths on the Internet, modern Li-ion batteries do not need to be completely discharged all the time. They do not suffer from the "memory effect" that reduces the actual capacity, unlike older NiCd batteries.

The only problem that regular partial charging of Li-ion can cause is when the gadget incorrectly estimates the remaining operating time. The problem can be solved by discharging the device to 100% once while it is turned off. There is no need to leave the device dead for a long time - for a Li-ion battery, finding long time in a completely discharged state leads to battery damage or partial loss of capacity.

Most manufacturers describe the battery life in cycles of complete discharge to 0%. This indicator for modern batteries is approximately 500 - 1000 cycles. If the gadget is charged at a value of 10 - 20%, then this will not mean complete discharge, and the cycle time will approximately triple.

Visual inspection of the battery

You don’t need to be a specialist to distinguish a damaged battery from a “healthy” one. Most problems can be seen with the naked eye. If your tablet or smartphone has a removable battery, you should remove it after turning off the device. After this, the following symptoms should be checked: swelling, white or greenish spots, corrosion around metal contacts.

If this is observed, then soon the gadget may become completely unusable. If you notice a distortion in the shape of the battery or suspicious spots, you must immediately purchase new battery. A problematic battery should not be put back in order to prevent electrolyte from spilling inside the device and damaging it.

"Rotation Test"

Lithium-based batteries degrade with each cycle. Improper storage only aggravates the situation - for example, hypothermia or overheating significantly reduces the battery life. If one in a great way To break the battery, it will discharge to zero and remain in this state for a long time.

The battery may gradually swell, a process that occurs over weeks or months. You won't notice the slight bend right away. A simple test can check this: the battery to be removed should be placed on a flat surface and twisted. If it rotates easily, then this is not a good sign.

Not all batteries can be easily and quickly removed and examined. In this situation, it is necessary to pay close attention to the speed of battery discharge. You should be alarmed by a loss of two or more percent at once and a rapid discharge to 0 in a couple of hours. These signs indicate that the battery will soon become unusable.

Software methods for checking the battery on Android

Android contains a log of battery information in an encrypted form in the system. This information can be obtained using special utilities. For example, the Battery application, “Battery Care” and other analogues.

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You can find various magic codes on the Internet, but they do not work in new versions of Android. In addition to the number of charge and discharge cycles, these utilities demonstrate operating temperature battery On this parameter It is worth paying attention if the battery gets very hot.

AccuBattery for Android

The AccuBattery application reads information from the battery controller and displays it in a visual shell. The utility helps you choose the most optimal charge, determine the applications that consume the most power from your gadget, and find out about the current battery wear.

Development of AccuBattery began after Dutch engineers tried to extend battery life. Not here we're talking about about slowing down discharge during the day. The goal is to ensure that the battery does not lose capacity after many months of use. The problem is also relevant because there are many modern gadgets come with non-removable batteries.

The developers conducted a series of tests, as a result of which important conclusions were drawn. There is no need to charge the device throughout the night, since during reboots the power source loses its capacity. The reason for this is the chemical processes that occur in the battery.

Mobile devices have an internal switch that stops charging when reaching 100% while power continues to flow, which affects the oxidation resistance of certain chemicals. It turns out that to fully charge the tablet or phone you need to disconnect it from the power supply as soon as possible, after 100% charging.

Most best option Battery charge is 80%. The AccuBattery app has a built-in alarm that sounds active signals when the optimal charge level is reached. It is located in the “Charging” menu.

"Charging" section

At the top of the working window there is a roundness, in the green part of which the current charge percentage is shown, and in the blue part - the acceptable one. The threshold of 80% is set by default, but it can be lowered or increased. To do this, you need to move the slider and pay attention to how this affects the damage to the battery.

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If you scroll down the window, you can find out the charging speed of your device from various power sources. For example, connect the “native” charger, then turn off the device for a couple of minutes and look at the Charge speed tab. It indicates exact information about the amount of time remaining until the optimal charge. To compare speeds, you can repeat the steps with a power bank or other charger.

Section "Discharge"

This section displays statistics on battery consumption since the last charge. The following information is available in the Battery usage subsection:

• How much percent was spent when the screen was turned off or on and over what period of time.
• Which apps cost the most? big number ampere hours (mAh).
• How long the gadget is in sleep mode, how often this mode was interrupted.

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You can also consider the list of applications that actively used the battery. The AccuBattery developers claim that their method of change is more accurate than that offered by the Android system.

Sections "History" and "Health"

The Health section is the main advantage of the application. When connected to a power source, it begins to track exactly how much energy is entering the battery and what percentage of the full charge it is. Based on the information received, the residual capacity is determined. To obtain a more accurate determination of the current capacity, several long charging cycles should be performed.

When buying a used iPhone, future owners pay attention first of all to appearance smartphone.

I would like to take a closer look at the case: examine it for scratches and chips, see if all the parts of the case are tightly assembled, if the lid or even the screen is loose, etc.

More demanding buyers check the quality of communication ( speaker and microphone), and some want to check the battery of their future iPhone. So, it is at this point that we will stop.

How to find out the number of battery charge cycles on an iPhone using a PC

In addition to this question, we will help you find out the level of battery wear on your iPhone

To determine the number of battery charge cycles it is useful useful application called iBackupbot. You just need to download from the proposed page and install it on your PC. Next, we do everything as in the screenshots below.

After starting the program and iPhone connections to the PC we see such a window. We click on our smartphone, and then on the right side of the window we look for the “More Information” button and click on it.

Immediately after this, a new window of this type will appear:

First point open window is named "Battery". The first sub-item is called “CycleCount”. His numeric value, in our case 355, represents the number of charge cycles of our iPhone's battery.

How to find out the number of battery charge cycles on an iPhone using a mobile application

The second method involves using a special mobile application called "Battery Life". You can download it for free from App Store, simply by entering the name in the search.

So, the program is installed. Let's launch it and see main screen. On the main screen we see the inscription “Wear Level”, the status is “Good”. This is a general indicator of the condition or life of the Apple mobile device battery.

There are four possible options:

1. Perfect (excellent)
2. Good
3. Bad (bad)
4. Very Bad (very bad)

We find the fourth item “History” and tap on it with our finger. A new window will open in which we are interested in the “Cycles” sub-item. This digital value indicates number of charge cycles iPhone battery.

That's all. It will be interesting to know your options for solving this problem in the comments.

All smartphones and tablets Apple are equipped with a Li-ion battery, which allows iPhone and iPad to work without the need to be constantly connected to a source of electricity. Unfortunately, all lithium-ion batteries have their life cycle, which is measured by the number of charging cycles.

Any battery iPhone generation and iPad is rated for approximately 500 charge cycles. This means that the device must be discharged to a total of 50,000%. It is worth noting that one charging cycle is equal to 100%. For example, if you discharge your iPhone or iPad to 25% in one day, charge it overnight, and start using it again in the morning, then one cycle will end when it reaches 75%.

If you count, then 500 cycles iPhone charging and iPad is about 1.5-2 years of daily use of the device. After this period, the battery loses approximately 20% of its capacity and also becomes more vulnerable to temperature changes, due to which the iPhone even with 25% of the remaining charge.

Upon reaching the 1000 cycle mark, the capacity iPhone batteries or iPad will drop to 50%. On average, this figure can be achieved within 3-4 years of using the device. This period is best to visit service center, after all, with a half iPhone capacity It can hardly work for 2-3 hours with the screen on.

If the device was purchased on the secondary market, then finding out the condition of the iPhone or iPad battery is quite problematic. It is for such cases that the definition of “Cycle” exists. You can find out the number of charging cycles using the program Battery Life, available in the app store.

On the menu Battery programs Life you need to select Raw Data, and then look at the Cycles value, which displays the number of battery charging cycles.

You can also find out this data using a computer on Windows based or Mac OS X. To do this, you will need to download and install iBackupbot. After launching the program, you need to connect your iPhone or iPad to your computer, and then select the connected device in the Devices section.

On the page that appears, you will need to click on More Information, which contains the CycleCount indicator. It displays the number of battery charging cycles.

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Lithium-ion batteries are not as finicky as their nickel-metal hydride counterparts, but they still require some care. Sticking to five simple rules , you can not only extend the life cycle of lithium-ion batteries, but also increase the operating time of mobile devices without recharging.

Do not allow complete discharge. U lithium-ion batteries There is no so-called memory effect, so they can and, moreover, need to be charged without waiting for discharge to zero. Many manufacturers calculate the life of a lithium-ion battery by the number of full discharge cycles (up to 0%). For quality batteries This 400-600 cycles. To extend the life of your lithium-ion battery, charge your phone more often. Optimally, as soon as the battery charge drops below 10-20 percent, you can put the phone on charge. This will increase the number of discharge cycles to 1000-1100 .
Experts describe this process with such an indicator as Depth Of Discharge. If your phone is discharged to 20%, then the Depth of Discharge is 80%. The table below shows the dependence of the number of discharge cycles of a lithium-ion battery on the Depth of Discharge:

Discharge once every 3 months. Fully charging for a long time is just as harmful to lithium-ion batteries as constantly discharging to zero.
Due to the extremely unstable charging process (we often charge the phone as necessary, and wherever possible, from USB, from an outlet, from external battery etc.) experts recommend completely discharging the battery once every 3 months and then charging it to 100% and keeping it charged for 8-12 hours. This helps reset the so-called high and low battery flags. You can read more about this.

Store partially charged. The optimal condition for long-term storage of a lithium-ion battery is between 30 and 50 percent charge at 15°C. If you leave the battery fully charged, its capacity will decrease significantly over time. But the battery, which has been collecting dust on a shelf for a long time, discharged to zero, is most likely no longer alive - it’s time to send it for recycling.
The table below shows how much capacity remains in a lithium-ion battery depending on storage temperature and charge level when stored for 1 year.

Use the original charger. Few people know that the charger in most cases is built directly inside mobile devices, and the external network adapter It only lowers the voltage and rectifies the current of the household electrical network, that is, it does not directly affect the battery. Some gadgets, such as digital cameras, do not have a built-in charger, and therefore their lithium-ion batteries are inserted into an external “charger”. This is where using an external charger of questionable quality instead of the original one can negatively affect the performance of the battery.

Avoid overheating. Well, the worst enemy of lithium-ion batteries is heat– they cannot tolerate overheating at all. Therefore, do not allow mobile devices direct sunlight and do not leave them in close proximity to heat sources such as electric heaters. Maximum permissible temperatures, in which it is possible to use lithium-ion batteries: from –40°C to +50°C

Also, you can look

All batteries consist of a cathode, anode and electrolyte. Charge accumulates on the charges where the chemical reaction occurs. It is reverse, and when charging it flows in the opposite direction. The cathode is a negatively charged plate, and the anode is a positively charged plate

Lithium-Ion batteries consist of an anode made of Lithium and Cobalt oxide, and a cathode made of carbon. When you charge your battery, electrons flow from the Anode to the Cathode, and when discharging, they flow in the opposite direction.

• at the anode LiCoO 2 => Li 1-x CoO 2 xLi + xe −
• at the cathode С + xLi + xe − > CLi x

The main advantages are higher voltage and no memory effect

New generation cell phones are usually equipped with new types of batteries - Li-Pol (Lithium Polymer) batteries. The differences lie in a different type of electrolyte, which consists of a gel-like substance of a polymeric nature. This technology makes it possible to make batteries of any size (up to 1 millimeter thick), are more environmentally friendly and are capable of delivering a higher current. Do not cause spontaneous combustion. New technology becomes more popular.

The battery takes a long time to charge. What's the point?

All mobile devices have inside information relative to the device's charge memory, and it is determined by the maximum and minimum voltage required for operation. The maximum developed voltage will automatically stop charging your battery (power controller), so what do you put on overnight and what do you wait until the signal is fully charged? no difference. But the first time you turn it on determines your normal capacity for an accurate display of battery life.

The battery needs to be fully charged and completely discharged, and at first this should be done 10 times to ensure full capacity. There is no point, since there is no memory effect

As we said in the previous review about batteries, it is Li-batteries that do not have a pronounced memory effect.

What is the memory effect This is a reversible effect of battery capacity loss, applicable to NiCd (Nickel Cadmium) and Ni-Mh (Nickel Metal Hydride) batteries. It is based on the formation of crystalline formations in the structure of the electrodes, which makes it difficult to exchange electrons and ions, reducing the working surface. Eliminated by complete deep discharge and charging the battery several times. Leads to almost restoration of battery capacity, or approaching it. The disadvantages of these types of batteries were their large size, low capacity and voltage.

And since there is no memory effect, is it harmful or pointless to discharge it deeply? It turns out that something bad is happening. Deep discharge Below the lower threshold of 3.0V may cause the device to turn off, but this does not mean that the battery has stopped wasting energy. After all, she spends it on work system device(memory), response to control buttons (how will they turn on?) and keeps your device in “sleep mode”. So what will happen? But it turns out that loss of charge to 2.5V can lead to loss of the ability to charge the battery, and it will have to be charged separately with a weak current of 0.1C, bringing it back to life. It is logical to assume that this will affect its capacity. The following conclusion can be drawn It's better to always have a charge than to completely discharge it!

The battery life is independent of operating time, but depends on the number of discharge cycles FALSE

This statement turns out to be completely false. Regarding the operating life - the battery willy-nilly loses charge (even when turned off), and as we mentioned in point 2 - this can lead to a discharge of up to 3V and below, and reduce the capacity of the device. The optimal temperature for maintaining charge and low exchange is 5 degrees (usual refrigerator temperature). Therefore, there is no point in buying batteries for future use unless you (1) store them in the refrigerator and (2) recharge them periodically.

We get the picture that discharge cycles affect the operation of the device. But in fact, it is not the quantity itself, but the duration of work that affects it. Batteries are subject to aging and usually the capacity decreases normally by 10% at 500-800 cycles That is, over a year of operation of the device, the capacity will normally drop by 5-10% .

Regarding temperature. At temperatures below minus 20, the battery begins to refuse to both charge and operate. And, when the temperature rises above plus 40 Celsius, the situation repeats itself. High temperatures also greatly reduce battery capacity. -20C, +40C - destructive temperature limits, comfortable zone +20C

In total, we have received enough information, refuted false information, and will finally do conclusion:

• When purchasing a device (smartphone), pay attention to the year of manufacture of the battery. If the product came out a year ago, pay attention to the battery life.
• Be sure to fully charge the battery to 100% when you first turn it on, this will help the phone determine your normal capacity
• Remember that after two years of service the capacity will drop and then you can look for a new battery
• Charge at room temperature and do not charge in the cold
• Don't let the battery drain completely
• When storing in a cold place, let the battery warm up and then only recharge if it is an additional battery