iPhone 6 iOS10 Battery Percentage Incorrect

The bottom line is that you have a failing battery. The only benefit to 11.3 is that it will tell you the condition of your battery. It won't change it. The life of a battery is not measured in days or years; all that matters is full charge cycles. The phone is rated for 500 full charge cycles to 80% of capacity. You can get the free app Battery Life and it will tell you the condition of your battery. Or the Mac app (if you have a Mac, of course) Coconut Battery. Or call Apple support and they can do a remote diagnostic. If the battery is weak (from your symptoms it almost certainly is) Apple will replace it for $29.

Also, what you are doing is not "charging properly". You have been taken in by a myth; there is no benefit to what you are doing (but no harm, either). The truth is you can charge the phone any time you want to, regardless of the state of charge, and stop charging it when you want to, regardless of the state of charge. You can charge from 40% to 60% if you want to. All that matters is the number of full charge cycles (that is, 0% to 100%). If you charge it from 50% to 100% that is 1/2 a charge cycle; do it twice and it is one charge cycle. Probably the best strategy is to charge overnight, every night. Your phone will start the day fully charged. It won't hurt the phone, because the smart charging circuit stops the charge process completely at 100%. And, if you enable iCloud backup, the phone will create a new backup every night when the phone is locked and connected to power and Wi-Fi. Something that you will be glad you have when your phone dies, gets run over by a bus, or is lost or stolen.

Calibrate the battery; drain it all the way down to 0%, and then charge it back up to 100%. After that, repeat the process a few more times, and you should see an improvement of the battery percentage indicator.

While I no longer have an iPhone 6, I experienced the same issues when it was less than 2 years old. Replacing the battery (at a Batteries Plus store) solved the problem. My wife also had an iPhone 6, bought at a different time, but never had the battery issue.

Having seen the problems with cutting out, jumping in charge level, and the gauge sticking at 100% on both my iPhone 6 and my wife’s iPhone

5 through several revisions of iOS I concluded it must be the reduced capacity of the battery being out of calibration with the phone.

I fitted a new battery to both phones and without any software change it’s sorted all the battery issues for both.

If you're still running the original battery in your 5 or 6, i

t’s a relatively easy DIY job to replace (see ifixit.com).

brien145 wrote:

Also in the past - maybe I'm bit too old - but I do remember with my previous mobile phones when the battery condition start going down you need to charge 2-3 times per day rather than just once when it was brand new, but never switching off when it shows 20% (I never had this problem with my iPhone 5s before)

Previous mobile phones were exactly that - phones. iPhones are not phones. They are very powerful computers that can make phone calls. About the only drain on a battery in a phone phone was the the cellular radio. In an iPhone (or an Android) phone you can install apps that require incredible amounts of energy. If such an app (or several) runs, and you have a weak battery (which means that it's internal resistance is higher), the battery voltage can drop instantly to below a value that allows the phone to continue working, so it shuts down. When you restart it that app isn't running, so the voltage can recover. See the section "When batteries chemically age" in this Apple article: iPhone Battery and Performance - Apple Support

I know this is an old thread, but I wanted to add something I have personally found to this discussion. I have an iPhone 6s plus, which has worked great up until I upgraded to iOS 11 a few months back. I remember last September or October of 2017 (somewhere around there) having a 50 mile bike ride and had just upgraded my phone's OS a few nights before. I had had NO battery problems until that time.

Anyway, on race day, I'm using my iPhone, like I always do, mounted on my bike with the MapMyRide app running and I remember half way through the ride (which was a 3 hour total ride) that I looked at my phone in disbelief that it said I was down to 20% power. I knew if that was correct, there's no way I would be able to gps my entire ride but I figured my phone would just die at some point and that would be that. I had to continue on with the ride.

Well, I did finish the ride and still had like 17% left which didn't make any sense at all. Ever since then I have been turning background refresh off every app I can think of that doesn't have to have it on, and have turned off email refresh completely (so that email is checked only when I go into it). I still have power problems.

So last night, I'm at 15% power and have barely used my phone all day long and I rebooted it just to see what would happen. It comes back up and says I have 65% power.

So here's my theory. The battery reporting function or process of determining power remaining is just completely screwed up or the battery is having intermittent issues with it. I'm a computer programmer so I'm always real careful with how everything is configured and how I use these products.

But anyway, now I believe that the reason my bike ride gps finished is because I was never down to that lower of a percentage anyway.

That's all I have to add for now but hope that all this is sorted out by apple at some point. If I need a new battery, I'd like to know. If it's a configuration issue, I'd like to know. This is definitely a wide-spread problem and definitely Apple is keeping their pie holes shut which is really annoying.

Just let us know what's going on Apple.....ay?

I have similar problem . I charged my iphone 6 to 100 % . After some time it goes on 48% (it was maybe 5-6 hours) and thats regular for my usage of phone than after an hour it goes on 17 and stays for a 4 hours and i think that cant be true

Please solve this

I have had similar issues with my iphone6. With each new update, my false battery readings, decreased battery usage and subsequent phone shut downs have increased. I have made adjustments per Apple and that’s hasn’t helped. I have reset the battery and that’s hasn’t helped. Yesterday the phone shut down after less than 20 hour s of moderate use. Charged overnight and it was back to 100% but two hours later with minimal use it went from 90% to less than 10 and soon shut down. Other days I have gotten four hours of use after 10% warning message. Not a happy camper and I am seriously looking at ditching my Apple products

My iPhone 6s plus, told me low battery and shut off when it was cold outside and won't turn on. When i got in a warm environment and charged the phone, it showing me a 65% battery left. It was so frustrating, especially I was trying to use the navigation system in an area I was not familiar with.

Unfortunately that is not solve the problem. I did try, because that was the "official" problem troubleshooting on the community website.

My phone just switching off automatically anytime anywhere when the battery still got 15-20%, when I plug to charge, the phone coming back with 32%....pffff...seriously...

Only 1,5 years old iPhone 6s. And I always take care of my phone. So to be honest I'm not expecting to replace the battery in any iPhone at this stage, maybe 1 or 2 years later.

I'm charging properly, wait until 20% or less and after start charging, not leaving on charge for overnight, so I try to do my best, but my phone doesn't.

You know, I don't mind if there is any problem with the phone if they try to fix it with the next software update. But they don't even try and not just only with this issue, the auto-brightness problem still exist at least for a half year now. The auto-brightness off and the phone brightness still going down to 80-90% randomly...that is annoying as well.

I read the article of the new 11.3 software update, a battery health options (beta version) coming with the update but I'm not too sure they will fix this problem.

Can anyone please let them know, we are still waiting for the proper solution. Thanks

Thank you for your answer and all your effort 🙂 (I've tagged as a helpful answer)

I'm just a bit disappointed because I'm not expecting to replace the battery in a 1,5 years old iPhone especially if I'm using as normal phone, plus this is not a cheap phone. I'm not playing games or watching movies on the phone, I'm just using as a phone not a Playstation Pro.

Everyone's got the same issue, the phone switching off even when the phone showing still have 15-20%

Also in the past - maybe I'm bit too old - but I do remember with my previous mobile phones when the battery condition start going down you need to charge 2-3 times per day rather than just once when it was brand new, but never switching off when it shows 20% (I never had this problem with my iPhone 5s before)

Anyway, I will call the Apple Support because I assume I do not have any other choice, specially this issue was posted in 2016 and nobody fixed it and released a new software update or something from Apple.

Don't make me wrong, I do love my other Apple stuff (MacBook Pro, iPod etc.), but this phone it just ehh...

Ok, my wife iPhone 7 perfectly working, fair enough. But this is the point when the people start thinking, shall I buy an iPhone 7 or just swap to a Samsung S7 or any other brand 😕...#justsaying

Anyway, thanks again.

heavengoloo wrote:

https://www.apple.com/support/iphone6s-unexpectedshutdown/

This link is directly tied to iPhone 6S users only, not iPhone 6 users.

That is because it is an identified defect in some 6S batteries. The 6 is a year older, and, as iphone batteries typically last about 2 years with heavy use, a battery in a 6 is probably nearing its end of life if recalibrating the battery gauge doesn't fix it.

I have a similar problem but mine is stuck at 100% and does randomly. I'd love for this to stop. I've let iit die completely and tried to charge it to 100% and nothing happened.

Is this the reason of the incorrect battery percentage?

I've been having exactly the same issues. I have been contemplating whether or not to have my battery changed.

Given that my iPhone6 is about a year and half now, I'd rather switch to a new (non-Apple) phone than deal with iOS bugs.

- Sri