[Repo] The iPhone turned off even though the battery was left!Record revived on its own
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Tweet from twitter @ iPhoneMania_jp December 13, 2021 14:22 Approximately 6 minutes 16 seconds until the reading is completed One day when I was using the iPhone, the power turned off even though the battery was still 30% or more. I encountered it. When I try to start it, it says that the battery is low, and it starts when I charge it, but after that, the power turns off when the remaining battery level reaches the 30% level. When I consulted with Apple Support, I was offered a high repair quote, so I would like to report on how I tried to find a way to recover on my own.One day, the iPhone suddenly turned off when the battery level was 30% or more.
I'm using an iPhone XR, but it's been over three years since I started using it, so I replaced the battery about a month and a half ago. As expected, the new battery had a long life and was comfortable to use, but one day the iPhone XR suddenly turned off during use. I tried to turn on the power switch suspiciously without knowing why it fell, but the message that the battery is low appears. However, before the power was turned off, the remaining battery power was more than 30%, and it did not even reach 20% when the remaining battery level warning was issued . When I charged it, the power turned on, but the battery level display at that time was 30% or more, which is a strange state.
The battery capacity display is 100%, but the power turns off when the battery is full.
This phenomenon should have been done only once, but it will continue to occur every time the battery level reaches around 30%. This phenomenon of the smartphone turning off even though the battery is still low is often seen when the battery is deteriorated. However, as mentioned above, my iPhone XR has just replaced the battery, and the capacity display that shows the health status of the battery is also 100% . Another thing I noticed is that the iPhone slows down and becomes unresponsive as a harbinger of power failure. When the battery is low, the iPhone slows down to keep it running for as long as possible, which is probably happening.
Talk to Apple support but get a repair quote of 50,000 yen
As expected, this would be strange, so I consulted with Apple's support . Apple accepts phone and chat support without having to go to the store. This time I consulted by chat. I answered various questions and received a remote diagnosis to identify systematic and mechanical problems, but the conclusion was that " repair is needed ". The estimated repair cost was 51,480 yen , and it would take 5 to 7 days without an alternative device, so I was quite shocked and ended the chat support.
As expected, I can not afford 50,000 yen for the iPhone 3 years ago, so I am looking for a solution on my own
It's really hard to pay 50,000 yen for the iPhone XR three years ago. Therefore, I searched on the Internet and searched for a way to solve the problem that the iPhone turns off due to the battery . As a result, I decided to do the following five methods in order of effort and money.
- Reboot
- Battery refresh
- Initialize the device and recover from backup
- Initialize your device and recover without backup
- Give up and buy a new iPhone
The details of each are explained below.
Reboot
It is a method to try recovery by restarting the terminal . The iPhone is said to be more stable than Android, but if you keep the power on all the time, there is a possibility that problems will accumulate due to software problems or the contents of the memory will be garbled due to the influence of cosmic rays. I have. The fact that the power is off makes me feel that it has already been restarted, but I thought it would be different if I restarted it in a normal state, so I decided to try this first.
Battery refresh
Battery refresh has many meanings, but what I want to try here is to improve the display error of the battery . Lithium-ion batteries are often used in smartphones, but in reality, it is not possible to accurately measure the remaining amount from smartphones . Instead, it "estimates" the remaining amount by measuring the voltage output by the lithium-ion battery. If this estimation goes wrong for some reason, the power will be turned off due to a rapid drop in voltage even though it is displayed that there is still remaining capacity, or conversely the display will be 0% even though there is still remaining capacity. It can happen. Therefore, the battery level is estimated again and the battery is refreshed to return to the normal display . The specific battery refresh method is as follows.
- Use your iPhone until the battery runs out and the power goes down
- Leave it off for 3 to 4 hours
- Charge to 100%
- Continue charging for a while while still charged to 100%
In addition, the battery refresh introduced here is only for improving the remaining amount estimation error, and the effect of recovering the deteriorated battery cannot be expected.
Initialize the device and recover from backup
Due to the continuous use of iPhone, there is a possibility that the operation of iOS is strange due to software malfunction. Therefore, it is possible to return iOS to a clean state by initializing the device and recovering from the backup . The iPhone's backup recovery function is excellent, and even if you initialize the device, you can restore it to its original state with very little effort. Although,
- Make a backup
- Initialize the terminal
- Recover from backup
- Manually recover what is not recovered by backup
The procedure is necessary, and it takes time and effort as it is.
Initialize your device and recover without backup
The last method to recover by yourself is to initialize the terminal and recover without using backup . This method was suggested by Apple support. If one of the installed apps is bad, the app will be restored to its original state when it is restored from the backup . Therefore, return the iPhone to a clean state, and first check if the power is turned off even though the battery is remaining in that state. If that's okay, you can install the apps one by one, try the same thing, and find out which app is causing it. It takes time to try each app, so
- Initialize the terminal
- Install half of the apps you were using
- If there is no problem, install half of the remaining apps and try, if there is a problem, reinitialize and try reducing the number of installed apps to 1/4
It would be efficient to repeat such trial methods to narrow down. However, there will be a period when the application you have been using will not be usable, and it will take much longer than the methods introduced so far, so it is a method that you do not want to do much.
Give up and buy a new iPhone
If you can't try this far, it's almost certainly a hardware issue, not a software issue . When that happened, I thought it would be better to give up and buy a new iPhone. I think it would be more constructive to spend a little more money to buy a new one than to spend 50,000 yen to repair the iPhone three years ago.
As a result of the trial, it recovers by refreshing the battery!
Fortunately, I recovered with a second battery refresh as a result of making and executing such a plan. The power does not turn off until the battery reaches 0%, and the battery display seems to have returned to normal. I think I was lucky because it takes time and effort to initialize the terminal. I'm even more happy when I think that the repair cost of 50,000 yen has come up.
Please note that battery refresh will put a burden on the battery.
Please note that battery refresh may put a burden on the lithium-ion battery . It is said that if the battery is fully charged, the chemical change of the battery will be promoted and the life of the battery will be shortened. Also, if the 0% condition continues, the protection circuit of the lithium-ion battery will work, and it may not be possible to charge the battery. For this reason, it is not recommended to refresh the battery frequently, and it is better to keep it small, such as when you feel something is wrong with the display or once every few months.
Improvement on your own is at your own risk
Fortunately, this time, I was able to improve the problem that the power was turned off even though the battery was full, and I did not have to pay the estimated repair price of 50,000 yen. However, in reality, it may not have cost 50,000 yen to send it to Apple for repair, and it may have been fixed in a more correct way. Also, the battery refresh that was effective this time is not an official Apple method. Encountering the same phenomenon as the author does not mean that it will be improved in the same way, so it is recommended that you first consult Apple support . Apple's chat support was very kind and answered this question clearly. Please consult with Apple and consider improving at your own risk only if you cannot accept Apple's proposal due to reasons such as high repair costs. Furthermore, while lithium-ion batteries have the advantage of being small and lightweight but having a large battery capacity , they are precision equipment that can lead to ignition if handled improperly . Please handle with care. Finally, I hope the content of this article I've tried will help those who are suffering from the same problem.
Source: Apple (1), (2), GIZMODO, iCracked, Nikkei XTECH (Hauser)
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Category: iPhone Mania Original Articles, Latest Information Tags: Apple, iPhone, iPhone XR, Support, Trouble, Repair, Charging