Hi Aleeha, This is what you said in your one email quote.
“Essentially, closing an app tells your device that something’s wrong, forcing it to try to find another way to do things. After closing apps a lot, your phone can become unstable and begin behaving oddly, causing the necessity to restart or even restore the device.” So I don’t know how you can back up this statement. You said quote “After closing apps a lot, your phone can become unstable and begin behaving oddly, causing the necessity to restart or even restore the device.” So now read this article below that was written by an Apple tech. He states in his article he closes his app twice a day. He also said. Is It Harmful To Close An App? Absolutely not. Here is his whole article below. Why Do We Close Out Our Apps? In my article about how to save iPhone battery life, I’ve always said this: block quote “Once every day or two, it’s a good idea to close out your apps. In a perfect world, you would never have to do this and most Apple employees will never say you should… A lot of battery drain issues occur when an app is supposed to close, but doesn’t. Instead, the app crashes in the background and your iPhone battery beings to drain without you even knowing it.” block quote end In short, the main reason I recommend closing out your apps is to prevent your battery from draining when an app doesn’t enter the background state or suspended state the way it should. In my article about why iPhones get hot, I liken your iPhone’s CPU (central processing unit; the brains of the operation) to a car engine: If you put the pedal to the metal for an extended period of time, the car engine overheats and it uses a lot of gas. If an iPhone’s CPU is revved up to 100% for an extended period of time, the iPhone overheats and your battery drains quickly. All apps use the CPU on your iPhone. Normally, an app uses a large amount of CPU power for a second or two when it opens, and then throttles back to a lower power mode as you use the app. When an app crashes, the iPhone’s CPU often gets stuck at 100%. When you close out your apps, you make sure this doesn’t happen because the app returns to the not running state. Is It Harmful To Close An App? Absolutely not. Unlike many programs on your Mac or PC, iPhone apps don’t wait for you to click “Save” before they save your data. Apple’s developer documentation emphasizes the importance of apps being ready to terminate at the drop of a hat: block quote “Apps must be prepared for termination to happen at any time and should not wait to save user data or perform other critical tasks. System-initiated termination is a normal part of an app’s life cycle.” block quote end When you close an app, it’s OK too: block quote “In addition to the system terminating your app, the user can terminate your app explicitly using the multitasking UI. User-initiated termination has the same effect as terminating a suspended app.“ block quote end The Argument Against Closing Out iPhone and iPad Apps There is an argument against closing out your apps, and it’s based in fact. However, it is based on a very narrow view of the facts. Here’s the long and short of it: list of 3 items • It takes more power to open an app from the not running state than it does to resume it from the background or suspended state. This is absolutely true. • Apple puts a lot of effort into making sure the iPhone operating system manages memory efficiently, which minimizes the amount of battery apps use when they remain in the background or suspended state. This is also true. • You are wasting battery life if you close out your apps because it takes more power to open iPhone apps from scratch than the operating system uses to resume them from the background and suspended state. Sometimes true. list end Let’s Look At The Numbers Developers often use CPU time to measure how much effort an iPhone has expend to accomplish tasks, because it can have a direct impact on battery life. I used an Apple developer tool called Instruments to measure the impact of several apps on my iPhone’s CPU. Facebook App XCode Instruments Let’s use the Facebook app as an example: list of 4 items • Opening the Facebook app from the not running state uses about 3.3 seconds of CPU time. • Closing any app wipes it from memory returns it to the not running state and uses virtually no CPU time – let’s say .1 seconds. • Pressing the Home button sends the Facebook app to the background state and uses about .6 seconds of CPU time. • Resuming the Facebook app from the background state uses about .3 seconds of CPU time. list end Therefore, if you open the Facebook app from the not running state (3.3), close it (.1), and open it again from the not running state (3.3), it uses 6.7 seconds of CPU time. If you open the Facebook app from the not running state, press the home button to send it to the background state (.6), and resume it from the background state (.3), it only uses 4.1 seconds of CPU time. Wow! In this case, closing out the Facebook app and reopening it again uses 2.6 more seconds of CPU time. By leaving the Facebook app open, you’ve used around 39% less power! And The Winner Is… Not so fast! We need to look at the big picture to get a more accurate appraisal of the situation. Putting Power Usage In Perspective 39% sounds like a lot, and it is – until you realize how infinitesimally small the amount of power we’re talking about is in comparison with the power it takes to use your iPhone. The argument against closing out your apps sounds great until you realize it’s founded on a statistic that doesn’t matter. As we’ve discussed, you’ll save 2.6 seconds of CPU time if you leave the Facebook app open instead of closing it. But how much power does the Facebook app consume when you use it? I scrolled through my newsfeed for 10 seconds and used 10 seconds of CPU time, or 1 second of CPU time per second I used the app. After 5 minutes of using the Facebook app, I would have used 300 seconds of CPU time. CPU Time for Closing Apps and Using Facebook In other words, I would have to open and close the Facebook app 115 times to make as much of an impact on battery life as 5 minutes of using the Facebook app. What this means is this: Don’t decide whether or not to close out your apps based on an insignificant statistic. Base your decision on what’s best for your iPhone. But that’s not the only reason why closing out your apps is a good idea. Moving on… Slow And Steady CPU Burn In Background Mode When an app enters background mode, it continues to use battery power even when your iPhone is asleep in your pocket. My testing of the Facebook app confirms this happens even when Background App Refresh is turned off. Facebook Background Mode After I closed the Facebook app, it continued using CPU even when the iPhone was off. Over the course of one minute, it had used .9 seconds of additional CPU time. After three minutes, leaving the Facebook app open would use more power than it would have if we closed it right away. The moral of the story is this: If you’re using an app every few minutes, don’t close it every time you use it. If you’re using it less frequently, it’s a good idea to close the app. To be fair, many apps go straight from background mode into suspended mode, and in suspended mode, apps don’t use any power at all. However, there’s no way to know which apps are in background mode, so a good rule of thumb is to close them all. Remember, the amount of power it takes to open an app from scratch pales in comparison to the amount of power it takes to use the app. Software Problems Happen All The Time Diagnostics and Usage Crashing Apps iPhone apps crash more frequently than you may realize. Most software crashes are minor and don’t cause any discernible side-effects. You’ve probably noticed it before: You’re using an app and all of a sudden, the screen blinks and you end up back on the Home screen. This is what happens when apps crash. You can also view the crash logs in Settings -> Privacy -> Diagnostics & Usage -> Diagnostic and Usage Data. Most software crashes are nothing to worry about, especially if you close out your apps. Often times, an app that has a software problem just needs to be launched from scratch. An Example Of A Common Software Problem It’s lunch time and you notice your iPhone battery has drained to 60%. Over breakfast, you checked your email, listened to music, sighed over bank account balance, watched a TED talk, flipped through Facebook, sent a Tweet, and checked the score from last night’s basketball game. Fixing A Crashing App You remember that a crashing app can cause your battery to drain quickly and that closing the app can fix it, but you don’t know which app is causing the problem. In this case (and this is real), the TED app is burning through CPU even though I’m not using my iPhone. You can fix the problem in one of two ways: list of 2 items 1. Instruments App Connect your computer to a Mac, download and install Xcode and Instruments, enable your iPhone for development, set up a custom test to inspect the individual processes running on your iPhone, sort them by CPU usage, and close the app that’s causing your CPU to stay revved up to 100%. 2. Close out your apps. list end I choose option 2 100% of the time, and I’m a geek. (I gathered the information for this article using option 1.) Reopening your apps from the not running state uses more power than opening them from the background or suspended state, but the difference is negligible compared to the significant power drain that happens when an app crashes. Why I Believe Closing Out Your Apps Is A Good Idea list of 3 items 1. Even if you close your apps every time you use them, you will not see a difference in battery life because the amount of power it takes to open an app is insignificant compared to the amount of power it takes to use the app. 2. Apps that stay running in background mode continue using power when you’re not using your iPhone, and that adds up over the course of a day. 3. Closing out your apps is a good way to prevent serious software problems that can cause your iPhone battery to drain very quickly. list end Close Out This Article This article is more in-depth than the articles I usually write, but I hope it was interesting and that you learned something new about how apps run on your iPhone. I close out my apps a few times a day, and that helps me keep my iPhone running as smoothly as possible. Based on the tests and my first-hand experience working with hundreds of iPhones as an Apple tech, I can confidently say that closing out your apps is indeed a good way to save iPhone battery life. From: viphone@googlegroups.com [mailto:viphone@googlegroups.com] On Behalf Of Aleeha Dudley Sent: Tuesday, November 22, 2016 8:07 PM To: viphone@googlegroups.com Subject: Re: Question regarding battery life, and phone getting warm It does say it will not help. If you read toward the end of the article, you will see this: On both Android and iOS, algorithms run memory management. They’ll close apps that need to be closed, typically ones that have been dormant for a while or are using more power or memory than they should. And they’re very good at knowing when you’re going to need data, or want a refresh, or open an app again. Apps that are already in memory open quickly, rather than having to fully start again; it’s like waking your computer from sleep rather than rebooting it completely. You’re far, far better off letting the system work for you rather than forcing it to re-open and re-start everything every time. Battery questions aside, it makes your phone slower and less coherent.. The rest of what I said comes from someone who works closely with Apple products on a daily basis. Also, you want reputable? Despite the fact that all the major Mac and tech sites, like Wired, Lifehacker, 9 to 5 mac, Apple insider, etc, all, have, articles like this, do some simple searching and you will find a nicely done 9 to 5 mac article with screenshots of emails with verified message headers that are directly from Apple itself stating such facts. Time magazine published a similar article, as did other, non-rumor based sites. So, believe me or not, there you have it. On Nov 22, 2016, at 7:36 PM, Mr. Ed <pink...@abe.midco.net> wrote: I find this hard to believe that closing an app in the app switcher is going to create problems. I will have to hear this from a good reliable source before I believe this. I think closing an app is just like closing it on the pc. It has no effect. In fact it might run better as it clear all the junk out and the app a lot of times works better after closing it in the app switcher and reopening it. This is what you said, “please, please, please read this article, closing your apps is a very, very unhelpful thing to do.” Now you need to go back an read the article on the link you posted. It said closing an app does not help battery life. I did not see where it said anything about closing an app could be harmful. Please correct me if I am wrong. Mr. Ed From: <mailto:viphone@googlegroups.com> viphone@googlegroups.com[ <mailto:viphone@googlegroups.com> mailto:viphone@googlegroups.com] On Behalf Of Aleeha Dudley Sent: Tuesday, November 22, 2016 7:05 PM To: <mailto:viphone@googlegroups.com> viphone@googlegroups.com Subject: Re: Question regarding battery life, and phone getting warm Hi, Just a couple of things here. First, is that screen curtain on its own will not help your battery. You must turn the brightness down to help in any way. Second, charging at higher levels does not affect your battery like it used to be rumored to. Third, and please, please, please read this article, closing your apps is a very, very unhelpful thing to do. It will not save battery and is not recommended (except for that one nasty time when Roger decided to eat your battery like a picnic lunch). Read this article and be informed. <https://www.wired.com/2016/03/closing-apps-save-battery-makes-things-worse/> https://www.wired.com/2016/03/closing-apps-save-battery-makes-things-worse/ Essentially, closing an app tells your device that something’s wrong, forcing it to try to find another way to do things. After closing apps a lot, your phone can become unstable and begin behaving oddly, causing the necessity to restart or even restore the device. HTH, Aleeha On Nov 22, 2016, at 5:58 PM, Tony < <mailto:t...@k5twz.com> t...@k5twz.com> wrote: >From what I have read and experienced with lithium batteries charging habits >don't have much effect on them. Depending on brand and the care in >manufacturing most batteries can be nearly completely discharged and then >fully recharged from 300 to 1000 times. Warranties are usually calculated at >about 300 times but I have seen some as low as 100 cycles. The life of a battery is not based on the number of times you charge it but on the total amount of current you use out of the battery. Any time you have a charger plugged in the battery's life is not being shortened because nearly all of the power used is provided by the charger and not by the battery. The only reason for frequently charging a battery is in case you may run it down before you are able to recharge it again. Batteries, and the equipment they are used in, have been developed to the point they pretty much protect themselves from over charging and over heating. They will quit working rather than become damaged. While other types of batteries could become hot enough to blister your sking or leak some unpleasant chemical, lithium batteries can fail by catching on fire. That is why so much effort and money has been invested in battery safety. Considering how many billions have been made, and how much users demand they be more powerful, the number of serious battery failures is continuing to decrease. Tony -----Original Message----- From: <mailto:viphone@googlegroups.com> viphone@googlegroups.com[ <mailto:viphone@googlegroups.com> mailto:viphone@googlegroups.com] On Behalf Of Chip Orange Sent: Tuesday, November 22, 2016 5:04 PM To: <mailto:viphone@googlegroups.com> viphone@googlegroups.com Subject: RE: Question regarding battery life, and phone getting warm Hi Terri, According to Popular Mechanics and Battery University, charging patterns have little to no effect on battery life in today's modern phones (they used to with other types of batteries), so no, when you decide to charge has no effect on how long your battery will last. As for things you can do to make the battery go longer between charges, you can turn off the display (or actually I mean turn down the brightness of the display). Turn off automatic brightness, the manually set the display to a very low brightness level. This means you will manually have to turn it back up if you want to show a sighted person something. Using the Voice Over curtain feature is not the same, and does not save any battery. As for the phone getting warm, I think this is just lack of cooling air circulating around it; especially as you describe it slipping down in the chair, but the bed is also a good insulator, even on one side. If it's plugged in when you feel it getting warm, I'd say this is normal. Sometimes my phone gets warm even when not plugged in, but that's when I'm using it a lot by talking or otherwise causing it to transmit (typing in texts, emails, other transmissions). I would think you could still by a battery case for your phone, certainly you can just buy an external battery to plug it into for charging. Hth, Chip -----Original Message----- From: <mailto:viphone@googlegroups.com> viphone@googlegroups.com[ <mailto:viphone@googlegroups.com> mailto:viphone@googlegroups.com] On Behalf Of Terri Stimmel Sent: Tuesday, November 22, 2016 1:29 PM To: <mailto:viphone@googlegroups.com> viphone@googlegroups.com Subject: Question regarding battery life, and phone getting warm Hello everyone, I have a few questions here. I am hoping someone can give me some thoughts, or advice. First of all, my phone is up to date. I have the 5S. I can upgrade by February, but I don't know if I will. I am paying for this phone monthly. Anyway, I have been noticing that sometimes my batter runs down faster. I am on my phone quite a lot some days, more than other days. Not always making calls, but checking out Facebook, and maybe commenting on posts, or making posts. Checking my email, or maybe writing some emails. Playing Farkle. Maybe reading a news story, and definitely texting! That's certainly the biggest thing. I do this all over WIFI. Every once in a while, I may play a video of some sort. But I use my Ipad for most of this. I don't know what causes more battery useage than other things. I am getting better at closing Apps if I am not using them. My biggest problem, is that I don't let my phone die, or completely run down, before charging it. I have heard this can be a bad thing. I will usually let it get to 40 percent, and then charge it. Sometimes 20 percent, if I am still wanting to finish up something quickly. So, are there things I could possibly change, to help save battery life? How low should my battery life really get, before charging my phone? I do not care for the low power mode. So I choose not to use it. Also, are there affordable battery packs, or anything like that, still available for the 5S? Now to my next question, and something that is concerning me more. About 3 times so far, in the last week, I have found that my phone gets pretty warm. I don't know why this is happening, or what could be causing it. Once it happened when my phone was laying on my bed. I don't always keep it on my bed. Just sometimes. Another time it happened when I was sitting in my rocker-recliner. The phone always ends up sliding down, between the arm of the chair, and the seat. It's never been an issue before. It has also happened while sitting on my desk. I do not keep it near my laptop. I am very caucious regarding this. Is this possibly a bad sign? Should I be concerned? What can I do about it, if anything. The phone does have a plastic cover over it, but it only covers the back of the phone. My phone doesn't get dropped, or anything like that. Any thoughts, or suggestions would be very much appreciated. Thank you, Terri -- The following information is important for all members of the V iPhone list. 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