Why the iPhone battery meter goes crazy times - Mashable

I understand the alternatives facts. Sometimes battery meter defended my iPhone.

Fact: I have 18 months of age for Apple - iPhone 6 . I find it in God's way, and not drop it, it to extreme temperatures or in water soaking. I invite regularly.

Fact: In a recent weekday afternoon, I grabbed my iPhone, which had on my desk untouched sit for hours, and realized that only 18% of the battery realized. It was officially in the red. I quickly connected to a charger, and a moment later it was 43%.

18% to 43% - in seconds.

I think have been a result of the replacement of the first battery count and the problem of the iPhone battery is more widespread than thought - and Apple is willing to admit.

For months he had heard strange stories battery of iPhone friends, colleagues and family members. Last year, Apple had - Reports in China and the United States before finally that some approved iPhone 6S camera were defective batteries .

This problem of the iPhone battery is more widespread than thought - and Apple is willing to admit.

The problem is that these problems with foreign batteries on the iPhone 5S still in use and even the iPhone 6S (but not, so I can say iPhone 7 and iPhone 7 Plus at least not yet). Free event include the percentage of the battery, where you can see your life from the battery drain, say, 30% to zero in the space of a few minutes or all at once with 20 to 30% of the remaining battery. There is also a sudden overeating is strange, as I already described: The claims battery that abundant battery available plug life show charging.

Although many people have complained battery odd hiccup, I was convinced until I practically all of them I lived.

Apple has many tips for the battery life of the iPhone administration and followed a largely possible:

  • I made sure that my IOS has been updated.

  • I have a good view of the background applications, the battery life was eating, especially those who have a lot of updates in the background activity, and tries whenever possible to restrict their use, (e-mail and Instagram was often near the top of the list for me).

  • Low-power mode used.

  • I followed the advice I found on other sites and the battery be recalibrated, which in turn rely on zero, then reboot makes the house and holding down the power.

None of these actions, however, prevented the failure of battery life happen again.

And they are not going to help other people who have experienced the same duration percentage strange problems of the battery.

In the flat

I knew my wife saw his own had iPhone 5S closed at 20% and 30%. to friends and colleagues I caught about their experiences. knew mentions Virtually all those who have problems with the iPhone battery, what he was talking about or had to share an experience.

During an Uber with two colleagues take recent weeks, he asked for their iPhone batteries (in its iPhones and 6S 6). Both have been reported in 20% unexpected shutdowns. Then our driver raised his voice and said he had similar problems as I have described, but it was only your phone for a year.

Apple support forums are full of similar complaints. Back in the iPhone 5S and iOS 7.1, users have reported rapid battery exhausted is. These complaints have persisted thanks to the iPhone 6 and iPhone 6S and 6S more , if some users also complain that the phone has been very hot .

Apple will not comment on what is happening with rechargeable lithium batteries or iPhone IOS software that conducts ions, and has not recognized beyond some unexpected closures iPhones problems.

Not published in the last year by Apple, that a small number of devices iPhone 6S established between September and October 2015. have a battery problem and were for in coming question the replacement of the battery free . Then in December, and only in the Chinese version of its support - site of Apple has announced that it had some phones worried "out of reach" phones that knew there was a defect in the battery were also determined. This led the company to integrate the new battery diagnostic software in an update of iOS for all users. This software is now in the field, gathering data to Apple. Earlier this year, a report on the surface that Apple could expand the program of replacement battery for iPhone 6 devices.

At the time of this writing, however, Apple has not yet revealed whether and what we learned about the erratic behavior of some of the iPhone batteries or the software that runs them.

Given the intermittent and incoherent these issues into account, it is not so surprising. Moreover, there is the complexity of the lithium-ion technology itself.

In your phone

Lithium - ion is essentially the chemistry live on the inside of the phone . Each lithium-ion battery of sheets (lithium cobalt oxide), composed (carbon electrodes) positive and negative, with the holed spacer elements, including wound overlap in tight spirals. During charging, the ions move towards the negative electrode during discharge and moved toward the positive electrode.

Lithium batteries are lighter and offer more energy density than their predecessors batteries, nickel-cadmium batteries. Lose about 5% of its monthly charge capacity. A considerable improvement in comparison with nickel-cadmium batteries, lose 20% You may also be volatile when it is not properly handled and prepared .

Lithium batteries last longer if they are not fully charged or charged.

A typical ion battery Lithium iPhone should take about 500 cycles. A cycle is a full charge, which could be extended for several days: they can be used the next day 25% of the battery power on the first day and 75%. Apple said last year that still applies artificial intelligence to improve the management of the battery, so that probably stretch further cycles.

How drains and the battery also affects the battery life. Lithium batteries last longer if they never fully charged or recharged (why, when a battery of devices such as smartphones to buy that usually comes with about 50% of the load, more or less 20%). Secondary chemical reactions increases when the battery is at 0% and 100% is discharged continuously charged.

Regardless, however, the capacity of the lithium-ion batteries will change with time.

As a new car as soon as you begin to write off drive away from the crowd, continually losing the lithium ion its capacity. This can be confusing because for the life of the phone, yet the device is anything between 0% and 100%. It's not a lie - 100% 10 hours 10 hours, directly to 100% of three hours, you could get 3 hours more than four years in the life of the phone. This percentage is relative.

not explain the generally accepted wisdom on rechargeable batteries that sudden stops, rapid processes and records the indicators for the duration of the wrong battery.

science programs

Experts say, however, that life and battery maintenance is an inexact science. various lithium-ion, for example, use different chemical compositions, which may affect the charge cycles. Professor Donald Sadoway, studied materials science at MIT, said most of the lithium ions are designed to go thousands of cycles, while 80% of its capacity to keep.

Even the way the battery life between handsets and manufacturers is measured differently, and there is no way to directly measure the remaining charge. So can read on your phone to the voltage based ", so that the voltage to identify, in a battery, can get an idea of ​​the state of charge", Sadoway said.

Other uses what is known as "plateau voltage", and some are to be integrated in the most difficult on the basis of measuring the amount of current flowing: If you know uses the amount of power over time, you can be calculated amount of energy that was used and this is (probably) left as. Professor Sadoway has no idea what chemicals or methodology used Apple.

The percentage of battery life we ​​see is an estimate.

Other experts with whom I spoke agreed that the battery life percentage we see an estimate is. "The only information from a telephone or a laptop to be used, the battery voltage, but it is absolutely a 1-1 correspondence between the cell voltage and the amount of energy remaining within" wrote Stanford University PhD student William Gent chemistry in an e-mail ,

The temperature, the deterioration of the battery and the amount of energy drawn from the battery may influence the overall estimate.

"Some more advanced systems may be able to use the extra information like this, to make a better estimate, but it is still an estimate," Gent wrote that has an iPhone 5S and learn fast discharge, unexplained jumps meters of the battery and the sudden closure Downs.

"Moreover", Gent wrote: "You can not only measure the amount of energy released at any time and adjusted because there are a number are a little difficult to calculate the total energy that is used, any error in the calculation of this energy into heat again (due to inefficiencies in the cell itself) and side reactions. are not useful added in the battery and lead to significant errors in the SOC [battery] after repeated cycling determination, "says Gent.

Professor Sadoway agree that there are many reasons why a battery charge indicator on the iPhone could be wrong.

"Assuming that the phone is actually measured correctly, but the switch to the screen is broken. It's a bit silly as that might be," added Professor Sadoway.

test

During my research I came across this post, to solve the ultimate guide the iPhone drainage , Scotty Loveless. It offers a friendly, step-by-step approach to improve the daily performance of the iPhone battery. What fascinates me, but the story of Loveless. He worked as a genius of the Apple Store for two years (mainly worked on the iPhone 3GS iPhone 4, iPhone 4S, and the first wave of iPhone 5 devices ). He writes: "The most difficult problem was nearing iPhone battery, was extremely difficult to determine the exact reason why someone had to carry the iPhone battery.".

I wondered whether Loveless, who currently works as a consultant for Apple Appinstructor could offer a preview and can - will help to solve my own problems with the battery of the iPhone.

Loveless he never said questions like mine saw while in the Genius Bar work "when the battery has been a failure."

Results of my iPhone 6 diagnostic tests. No obvious issues.

The results of my iPhone 6 diagnostic tests. No apparent problems.

Image: Apple software

Battery life does go pretty fast throughout the day.

Battery life is the day not very fast.

Image: Apple software

Nevertheless, you have access to your old iPhone diagnostic tools and showed me how he could work on my iPhone remote (Note: I did not know that you can do it). I have a few details to share from my phone, including the IMEI number. After a few steps and screens on my phone, Loveless was and began to carry out a comprehensive set of diagnostic tests.

We find the evidence with my elegant affair Apple in the iPhone 6 and then again with him from. In both cases, the results showed that my battery fails and 423 charge cycles, which are outside by Loveless, much as 1,000.

This result is not far from conclusive, but could the idea that these problems do not support related to batteries or devices at the end of her death to life.

charge

Ghent Stanford remembered, however, that the lithium ions are reduced, "Determination gets less accurate, especially if it is near 0% SOC. So can imagine the phone or laptop, the base voltage battery that has left 30% but then the voltage starts to leave unexpectedly falling fast (because the cell is old and a little degraded) and the computer recognizes fact SOC lower than previously thought. "

This confirms my theory that it has the ability to provide this information to interpret a real confusion between the actual state of the battery, the material to the operating system and the ability to accurately system.

The research teams around the world are working on lithium latest technologies, including lithium-air (which has a very high energy density) and lithium sulfide (much cheaper than lithium ion), but the lithium ion, also worsen these technologies over time, what measurement means remain challenges. Gent think that the work can improve the measurement of the battery may be its greatest fruit. "I think the biggest improvement in the management side of the battery will come in place of the battery technology."

The good news, so that it is worth, is that you are not crazy. All my interlocutors, consumers and experts acknowledge there is a problem with the readings of the iPhone battery.

Sadoway of MIT told me invite physically iPhone can not both 10% and 40% in a period of a few seconds or minutes. "It was not much. It's a broken somewhere in the chain link."

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