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Regarding this issue with battery I kept track of consumption yesterday. In 8 hours with 20-30 minutes of use battery did drop 14%!! This just does not add up when during night when phone is not in use it uses 5% battery in 8-9 hours and during use (=screen on) consumption is approx. 6% in 30 minutes, so it should have used mostly 11% probably even less since it was 20-30 minutes of use only, so this just does not add up as it should. Are batteries really so bad in phone this price range? For a phone costing 1k I expect nothing but top quality parts.
 
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Regarding this issue with battery I kept track of consumption yesterday. In 8 hours with 20-30 minutes of use battery did drop 14%!! This just does not add up when during night when phone is not in use it uses 5% battery in 8-9 hours and during use (=screen on) consumption is approx. 6% in 30 minutes, so it should have used mostly 11% probably even less since it was 20-30 minutes of use only, so this just does not add up as it should. Are batteries really so bad in phone this price range? For a phone costing 1k I expect nothing but top quality parts.

In both your phones? What about your good one?
 
Interesting thread. I’ll try to keep my comments short. My wife and I buy the same phones and have since the 5, 6+, 6s+, 8+ and now Xs Max.

My wife’s 6s+ had vast differences in battery longevity. My wife’s phone would last a quarter of mine and randomly shut off during usage then start up with 10% life left. Apple said battery was green and refused to do anything. CoconutBattery showed capacity fluctuating wildly between 40-80-98%. Eventually I paid $ to get it fixed and during the battery install at Apple they destroyed her phone. We got a replacement but no $ refund on the battery. Her replacement 6s+ lasted as long as mine. Apple eventually sent $50 back to us when they did the $29 battery program.

I’ve had times where after an iOS update my battery would drop percentages like a brick. Like 100-60% in hours where I could usually get days out of my phone. I’ve found for some major iOS updates I’ve had to drain the phone to 0% to recalibrate the phones % reader for the battery. Out of all my iPhones I’ve only had to do this like 3 times. (Not recommended anymore on newer phones / tablets).

Batteries are a chemistry and not exact. I use coconutBattery to monitor my phones battery once a week for the life of the phone. I write down cycles and battery capacity. It fluctuates throughout the life of the phone usually going up the first 100 cycles then slowly dropping after. Most of my phones I sell back to apple after 200-250 cycles or 1.7-2 years of usage. All of my phones were within 6% of the battery capacity that I got them on day one when I got rid of them. Most were 3% or less.

My wife’s 6s+ was the only faulty battery I’ve ever had from Apple.

My recommendation? Don’t look at just now. Only read your battery capacity at full charge! It fluctuates when not at full charge. Full charge is not 100% but when the phone stops accepting current. You can see this in coconutBattery. Observe your phones capacity vs design capacity over the period of a few weeks. Write down in a spreadsheet. This is the clearer picture.
 
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I call BS, because my old X (now my wife's) has the same battery life with iOS 12 (at least, not noticeably different) as it did on 11. Maybe you are using new / a different mix of apps that have different battery demands?
That and so many different issues. It’s sucks to experience bad battery though.
 
In both your phones? What about your good one?
So far what I have checked similar circumstances on good phone, it is not doing that. Like I described in real world test battery use in mine does not add up to what it is supposed to be when testing idle vs usage time battery consumptions.
[doublepost=1544887844][/doublepost]
Batteries are a chemistry and not exact. I use coconutBattery to monitor my phones battery once a week for the life of the phone. I write down cycles and battery capacity. It fluctuates throughout the life of the phone usually going up the first 100 cycles then slowly dropping after. Most of my phones I sell back to apple after 200-250 cycles or 1.7-2 years of usage. All of my phones were within 6% of the battery capacity that I got them on day one when I got rid of them. Most were 3% or less.

My wife’s 6s+ was the only faulty battery I’ve ever had from Apple.

That sounds about what kind of capacity dropping should be. For example in my 7 it dropped only 2% in about one year, and it was maybe 7-8 months until it did go below 100%. This happened again the first time I accidently ran battery nearly 10%. Like I mention below, something strange is going on with batteries now. I had similar problem with capacity dropping fast in new iPads. I actually exchanged it couple times and even when I found one that looked promising for a while, did drop eventually in short period of time several percentages. It is now down 6% in only about 55 charge cycles!!! This began to happen when it was run below 20% for the first time and when I let charger be plugged in for additional 1,5-2 hours after it reached 100%. For example my iPad Air was down 3% after over three years and countless numbers of charge cycles (battery should be the same in both models)!!

My recommendation? Don’t look at just now. Drain to 0% to recalibrate(don’t do this often). Only read your battery capacity at full charge! It fluctuates when not at full charge. Full charge is not 100% but when the phone stops accepting current. You can see this in coconutBattery. Observe your phones capacity vs design capacity over the period of a few weeks. Write down in a spreadsheet. This is the clearer picture.
I've been keeping track of my devices like that for some time. I take some notes to see how they age. However I try to refrain from fully drain to 0% or let go under 20% even for testing purposes, as I have noticed it seems to do permanent damage to batteries used in newer devices of this brand.

I know battery is not really full when phone shows 100%, it is around 95% when checking with iMazing.
 
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So far what I have checked similar circumstances on good phone, it is not doing that. Like I described in real world test battery use in mine does not add up to what it is supposed to be when testing idle vs usage time battery consumptions.
[doublepost=1544887844][/doublepost]

That sounds about what kind of capacity dropping should be. For example in my 7 it dropped only 2% in about one year, and it was maybe 7-8 months until it did go below 100%. This happened again the first time I accidently ran battery nearly 10%. Like I mention below, something strange is going on with batteries now. I had similar problem with capacity dropping fast in new iPads. I actually exchanged it couple times and even when I found one that looked promising for a while, did drop eventually in short period of time several percentages. It is now down 6% in only about 55 charge cycles!!! This began to happen when it was run below 20% for the first time and when I let charger be plugged in for additional 1,5-2 hours after it reached 100%. For example my iPad Air was down 3% after over three years and countless numbers of charge cycles (battery should be the same in both models)!!


I've been keeping track of my devices like that for some time. I take some notes to see how they age. However I try to refrain from fully drain to 0% or let go under 20% even for testing purposes, as I have noticed it seems to do permanent damage to batteries used in newer devices of this brand.

I know battery is not really full when phone shows 100%, it is around 95% when checking with iMazing.

Thanks for the info. How interesting. I usually keep my phone at 80-100% for the life of the phone. Rare for me to go below 80%. Note taken about these new batteries. They seem more sensitive to heavy usage. :(. I modified my original post. Thanks!
[doublepost=1544888628][/doublepost]My wife has always been a far heavier user of her phone than I (social media, friends, etc). She often times gets to near zero and or low percentages. Her phone is usually within a few % of mine capacity wise when we turn our phones in. I haven’t been checking her Xs Max regularly. Will keep an eye on it.
 
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Yeah, that is interesting what is going on with new batteries. Are there simply some much variance in quality or is there something different in hw design that explain this somehow (but it is hard to believe battery capacity would be dropped intentionally, at least I'm not smart enough to come up with any reason for such)?

Do you charge your phones more than once a day to keep them between 80-100% charge?
 
Yeah, that is interesting what is going on with new batteries. Are there simply some much variance in quality or is there something different in hw design that explain this somehow (but it is hard to believe battery capacity would be dropped intentionally, at least I'm not smart enough to come up with any reason for such)?

Do you charge your phones more than once a day to keep them between 80-100% charge?

Very interesting indeed. I have a charger at work and home. And I have a car charger. I plug in whenever I can unless it’s at 100% then I’ll set it down on desk. I’m a light user. I read books, some news, and macrumors. I don’t do social media. Some photography (hobbyist).

Anker batteries for trips. :)
 
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I just did more detailed battery test (I just posted the same in another thread about battery).

I've been tracking manually my new X battery life and I'm very unhappy with it. I just measured 2 hours and 9 minutes of SOT in 53 hour period of time and during that battery went from 100 > 45%. I barely used the phone during that time and it was with very low screen brightness (around 25%). I also noticed that times in new battery menus are sometimes exaggerated (like probably in this test I made) since I noticed that you get 1 minute usage time logged every time you open up some new app, even if you close it right away after opening it, so 1-2 seconds real use and you get logged 1 minute. In my test I often just woke the display to check the battery and maybe opened some program to briefly check emails and weather or such.

Does not seem very good to me for a new phone.
 
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My SE old battery lasted longer on iOS 10 than the newly replaced battery on iOS 12.

It's Apple's way of saying "It's about time you give us another $1,000 to get your battery life back."

Then you rejoice with XS and tell everyone how awesome the battery life is, and a year later "hmmm..it's not so great anymore with iOS 13....."

and so the cycle continues.
 
On iOS 11.3 or earlier, my X used to give 4 hrs of screen time from 100% to 60%. With 8-10 hrs of total screen usage.

As of iOS 12 (all versions), my X (earlier 100% battery initially on iOS 12, now 97% battery) comes down to 60% in about 2.5 hrs of screen usage with a total screen usage of 5-7 hrs with similar usage.

My 7 met the same fate as iOS 10/11 progressed. Initially 8+ hrs and later barely 6. With a near fresh battery.

My mom’s 7 started with 9 hrs screen usage and is now down to 4ish with a 100% battery on iOS 12.

Many of these devices have been DFU restored and started clean without a backup.

Happens across every single iPhone.

Will happen to XS series as the year progresses. And so on.

What they do is add a bunch of extra function calls that bog down the older cpu. So animations and transparency effects. These “refreshes” of the ui/ux are also unoptimized on older devices. The net effect is your older cpu does more calculations to do the same thing. Resulting in a slower experience and worst battery life while continuing denying anything nefarious.
 
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I just did more detailed battery test (I just posted the same in another thread about battery).

I've been tracking manually my new X battery life and I'm very unhappy with it. I just measured 2 hours and 9 minutes of SOT in 53 hour period of time and during that battery went from 100 > 45%. I barely used the phone during that time and it was with very low screen brightness (around 25%). I also noticed that times in new battery menus are sometimes exaggerated (like probably in this test I made) since I noticed that you get 1 minute usage time logged every time you open up some new app, even if you close it right away after opening it, so 1-2 seconds real use and you get logged 1 minute. In my test I often just woke the display to check the battery and maybe opened some program to briefly check emails and weather or such.

Does not seem very good to me for a new phone.

iOS 12 has bad battery drain on standby. Even on XS and XR. You usually end up losing 0.5-1% an hr on WiFi and more on 4G. On standby. That could be the reason you’re facing this issue.

A new X should be able to get 5-6+ hrs of on screen usage (unless it’s heavy gaming on something) over a 12-24 hr period. Mixed usage that too. Not just low brightness or Wifi.
 
iOS 12 has bad battery drain on standby. Even on XS and XR. You usually end up losing 0.5-1% an hr on WiFi and more on 4G. On standby.

How’s this “bad” battery drain?! The radios still need to work all the time even when the device is on standby!
 
Upgrade you’re hardware son.
Why do these posts keep coming up? So I have the XS and I update it to iOS 13 as soon as it comes out. This happens. You will tell me to buy the new version? This is either ironic, or blatant trolling. You cannot be serious.
Obviously, you will not be able to explain why my 6s has great battery on iOS 9, why my 7+ is getting 12 hours on iOS 10, or why my iPad Pro 9.7 is getting 14 hours on iOS 9. Not new hardware, no iOS updates, perfect battery life.
These posts are already vexing when people are on older devices, because they're misguided, but this one is on another league.
[doublepost=1545219521][/doublepost]As usual, iOS updates decrease battery life. iOS 12 is no exception, unfortunately.
 
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iOS 12 has bad battery drain on standby. Even on XS and XR. You usually end up losing 0.5-1% an hr on WiFi and more on 4G. On standby. That could be the reason you’re facing this issue.

A new X should be able to get 5-6+ hrs of on screen usage (unless it’s heavy gaming on something) over a 12-24 hr period. Mixed usage that too. Not just low brightness or Wifi.

How’s this “bad” battery drain?! The radios still need to work all the time even when the device is on standby!

On standby overnight (6-7 hours typically) I seldom lose more than 1 or 2%.

I would consider 1% per hour pretty bad battery drain on standby, the likes of which I’ve never experienced on an iOS device.
 
On standby overnight (6-7 hours typically) I seldom lose more than 1 or 2%.

I would consider 1% per hour pretty bad battery drain on standby, the likes of which I’ve never experienced on an iOS device.

If you’re charged up to 100% before going to bed then the battery seems to deplete about 1-2% overnight. Otherwise it drains a bit faster for me as well. But during the day even on standby it loses faster than at night. I think iOS might have a scheduler to cut down inactive / unnecessary processes at night.
 
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If you’re charged up to 100% before going to bed then the battery seems to deplete about 1-2% overnight. Otherwise it drains a bit faster for me as well. But during the day even on standby it loses faster than at night. I think iOS might have a scheduler to cut down inactive / unnecessary processes at night.

The length of time for the drop from 100% to 99% is always longer than normal on every phone I’ve owned (non Apple) even during the day. What you describe is normal battery behavior based on my experience. I unplug mine before bed and it’s still at 100% in the morning. Once it hits 99% a drop of 1% per hour seems pretty normal to me.
 
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The length of time for the drop from 100% to 99% is always longer than normal on every phone I’ve owned (non Apple) even during the day. What you describe is normal battery behavior based on my experience. I unplug mine before bed and it’s still at 100% in the morning. Once it hits 99% a drop of 1% per hour seems pretty normal to me.

Indeed. That’s exactly what I was trying to say to the other poster.
 
The length of time for the drop from 100% to 99% is always longer than normal on every phone I’ve owned (non Apple) even during the day. What you describe is normal battery behavior based on my experience. I unplug mine before bed and it’s still at 100% in the morning. Once it hits 99% a drop of 1% per hour seems pretty normal to me.
What is your reason for not charging overnight while you sleep? I've seen many members that do the same and am always curious about the thinking behind it.
 
3. My phone very often does that when it has not been used and I pick it up, drops 2-3% pretty fast. Like overnight it dropped 5% but as soon as I pick it up it goes down 1%, then within a minute another 1% and then stabilizes during under first 5 minutes by dropping maybe 1% more (so total 3%). After that is seems to drop 1% after every 5-6% during use. But that another X usually does not drop in the beginning like that and most of the times I tried it, it did drop first 1% after few minutes and then again with rate of 1% every 5-6 minutes during use.
So in this they are different and I think this explains why mine need charging more often.

You said you have another family member having the same iPhone X bought at around the same time but that does not mean you both have the exact same apps and configurations. The battery meter is an approximation and will fluctuate based on the load and power requirements. Maybe you should try calibrating your X's battery and see if that makes a difference. Don't compare two devices unless they have the exact setup.

For example my X came out of the box with 2782mAh battery (nominal is 2716mAh), but as soon as after first charge it lowered couple tens. Another X came out of the box with 2884mAh battery (so about the same) but after first time charging it did increase to around 2800mAh. Also difference between the two was that mine came out of the box with pretty empty battery (around 1/3ish) while that other was around 3/4's. So obviously mine did lose quite a bit charge while sitting in box.

All the battery measuring apps just state the approx capacity and they can go up or down as you can see in the below screenshot. Don't solely rely on those for your observations.
Screen Shot 2018-12-19 at 11.38.29 AM.png
 
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I never pay any attention to battery stats and what not. I use my phone daily, usage is never the same and I charge it when I need to, or at night. if anything is to blame its different apps, when I took time out of social media my phone battery lasted longer.

I say stop over analyzing and enjoy the device.
 
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