iPhone SE Anyone seeing slowdown on their 6s/SE?

mr.steevo

macrumors 65816
Original poster
Jul 21, 2004
1,323
774
I have a 16GB SE that System Preference indicates 9GB used and Battery Health reports as having 93% health.

The past few weeks I’m seeing the smoothness fade from this phone. Choppy transition between apps, slow camera action, just slower overall. I backed up and reinstalled iOS two days ago and it still seems choppy.

Is this something you other A9 users are seeing? Just wondering if updates are slowing down all devices or if it’s just mine.

If not I’m going to replace the battery.

Thanks
 

jwolf6589

macrumors 68000
Dec 15, 2010
1,915
298
Colorado
I have a 16GB SE that System Preference indicates 9GB used and Battery Health reports as having 93% health.

The past few weeks I’m seeing the smoothness fade from this phone. Choppy transition between apps, slow camera action, just slower overall. I backed up and reinstalled iOS two days ago and it still seems choppy.

Is this something you other A9 users are seeing? Just wondering if updates are slowing down all devices or if it’s just mine.

If not I’m going to replace the battery.

Thanks
My mom has a SE and has no issues. But she has 64GB. I think the issue is your 16GB which is nothing.
 

mr.steevo

macrumors 65816
Original poster
Jul 21, 2004
1,323
774
My mom has a SE and has no issues. But she has 64GB. I think the issue is your 16GB which is nothing.
Do you think 7GB free is not enough for the phone to breathe?

I appreciate the input
 

now i see it

macrumors 603
Jan 2, 2002
5,516
11,210
7 is plenty of free space. That's not the problem nor is it your battery. Wait it out until the next iOS update
 

DeltaMac

macrumors G4
Jul 30, 2003
10,449
2,780
Delaware
I would suggest first: try a backup and restore through iTunes. It's a fairly painless process, and CAN provide some performance relief as some internal temp files/etc, would be cleaned up during the restore.
 

se95dah

macrumors regular
Dec 30, 2014
101
137
In battery health settings, underneath where it says Maximum Capacity 93%, what does it say about “Peak performance capability”? Performance throttling due to chemical degradation of the battery does not necessarily correspond to a certain percentage of capacity - your phone may be slowing down to prevent unexpected shutdowns and its this second heading in “battery health” that is more important. Can you tell us what your phone says here?
 

Shirasaki

macrumors G4
May 16, 2015
10,217
4,032
I start experiencing increasing amount of system random freeze (sometimes a hard reset is the only thing to fix it) and app freeze, as well as overall sluggish navigation experience. I think iOS 12 is tweaking my device to a level that forces me to upgrade but not hard enough.
 

Significant1

macrumors 6502a
Dec 20, 2014
847
285
No problem on 6s. But the battery was running low in no time (89% health), so I just had it replaced and now it is better.
 

pika2000

Suspended
Jun 22, 2007
5,587
4,896
I have a 16GB SE that System Preference indicates 9GB used and Battery Health reports as having 93% health.

The past few weeks I’m seeing the smoothness fade from this phone. Choppy transition between apps, slow camera action, just slower overall. I backed up and reinstalled iOS two days ago and it still seems choppy.

Is this something you other A9 users are seeing? Just wondering if updates are slowing down all devices or if it’s just mine.

If not I’m going to replace the battery.

Thanks
Mine is still at 100% capacity battery (replaced by Apple few months ago).
There are occasional stutters, which are really rare. Eg. slowdown going to home screen, or starting an app. Imo this is the effect of the new scheduler introduced in iOS 12. My guess is after a deep sleep state, it takes a “while” for the A9 to ramp up its CPU. But other than that, I rarely experience slowdowns (unlike iOS 11 where you do feel something is bogging the phone down).
 

mr.steevo

macrumors 65816
Original poster
Jul 21, 2004
1,323
774
In battery health settings, underneath where it says Maximum Capacity 93%, what does it say about “Peak performance capability”? Performance throttling due to chemical degradation of the battery does not necessarily correspond to a certain percentage of capacity - your phone may be slowing down to prevent unexpected shutdowns and its this second heading in “battery health” that is more important. Can you tell us what your phone says here?

It says

“This iPhone has experienced an unexpected shutdown Because the battery was unable to deliver the necessary peak power. You have manually disabled performance management protections “

This shutdown happened when we had a cold spell and I was walking outside in -35.
I suppose the battery could be the issue as the restore hasn’t made much of a difference.
 

Freakonomics101

macrumors 68030
Nov 6, 2014
2,649
1,704
It says

“This iPhone has experienced an unexpected shutdown Because the battery was unable to deliver the necessary peak power. You have manually disabled performance management protections “

This shutdown happened when we had a cold spell and I was walking outside in -35.
I suppose the battery could be the issue as the restore hasn’t made much of a difference.
Off topic but that cold spell (if the one I think you’re referring to) was miserable!! Wind chill flirted with -60°F. I didn’t use my phone outside for this very reason. I kept it in my coat pocket so it could stay warm. Glad I did because I got frostbite in less than 3 minutes.
 

mr.steevo

macrumors 65816
Original poster
Jul 21, 2004
1,323
774
Off topic but that cold spell (if the one I think you’re referring to) was miserable!! Wind chill flirted with -60°F. I didn’t use my phone outside for this very reason. I kept it in my coat pocket so it could stay warm. Glad I did because I got frostbite in less than 3 minutes.
It was uncomfortable For Sure.
 

ghanwani

macrumors 68000
Dec 8, 2008
1,925
1,256
I have the same battery issue with my SE and I do experience some slowness and on rare occasions freezing. But it’s still a very usable device.
 

user_xyz

macrumors 6502
Nov 30, 2018
340
382
I have a 16GB SE that System Preference indicates 9GB used and Battery Health reports as having 93% health.

The past few weeks I’m seeing the smoothness fade from this phone. Choppy transition between apps, slow camera action, just slower overall. I backed up and reinstalled iOS two days ago and it still seems choppy.

Is this something you other A9 users are seeing? Just wondering if updates are slowing down all devices or if it’s just mine.

If not I’m going to replace the battery.

Thanks
My 6s is fine.
As good as ever.
I stay on IOS 12.0.1
 

Mity

macrumors member
Nov 1, 2014
60
11
I have an iPhone 6s and I got the battery replaced last fall because I still prefer Touch ID (I greatly dislike the Face ID on my new iPad Pro). I'm still on iOS 11 and I've noticed a slowdown in the last month or so. It happened almost instantly. I haven't had any random shutdowns, just the feeling of being slow and choppy. I've taken very good care of my iPhone - no drops, damage whatsoever. I decided to update to iOS 12 just now to see if that fixes it. If not, I'll have to upgrade to an iPhone 8.
 

drumtroll

macrumors newbie
May 12, 2019
1
0
It says

“This iPhone has experienced an unexpected shutdown Because the battery was unable to deliver the necessary peak power. You have manually disabled performance management protections “

This shutdown happened when we had a cold spell and I was walking outside in -35.
I suppose the battery could be the issue as the restore hasn’t made much of a difference.
"This iPhone has experienced an unexpected shutdown Because the battery was unable to deliver the necessary peak power," is Apple's way of telling you they throttled your processor so as not to stress a taxed battery. However, "You have manually disabled performance management protections" is Apple's way of saying you then went in and turned off said throttling, which you would've done on the same settings page as this message.

If you're still experiencing seemingly slower performance after turning performance management off, though, then something might be up... Firstly, the SE battery can be bad when the battery health even when it measures in the mid-to-low 90s range; mine was, and was about unusable once it degraded further into the high-80s range. When I finally took it in for repair, the battery was swollen (which explained the noise I would sometimes here when pressing down on my screen). I had dropped mine in water briefly at one point, so that could've started a slow degradation of my battery which didn't manifest itself until almost a year later, who knows. Similarly, the cold could've done some subtle damage to yours that is manifesting later (again, who knows; I'm just throwing theories against the wall).

The battery in my wife's SE, though, also started behaving badly in the mid-to-low 90s range, though, and qualified for replacement. (Hers has never been dropped in water, exposed to cold etc.) So, with performance management turned off and your battery health at 93%, it could very well be time to have your battery replaced.

Before getting my own battery replaced, I did download Coconut Battery to my Mac as a way to independently measure of my iPhone's battery health... it seemed to be way more accurate and showed a much less healthy battery. So, you could try that to see if it sheds any light on the situation.

Regardless, with your battery showing performance management [throttling] kicked in and showing a not entirely healthy 93% health rating, you could try taking it into the Apple Store to see if they'll replace the battery. If replaced, chances are you probably see improvement. (They can also run a diagnostic over the phone if you don't want to spend time at an Apple Store right away.)

OH, ALMOST FORGOT: Have you upgraded the iOS version, recently? Increased battery drain is always a thing for the first few days after an upgrade as the phone is busy reindexing files, then it calms down a few days later. I saw another thread on here about iOS 12.2 causing drain on the iPhone SE, though it's hard to tell if the issue is "real" since no one says how many days/weeks it's been since they upgraded to the latest version. (I'm still on 12.1 so I have nothing to add to that conversation, at the moment... though it sounds like the 12.3 betas might be gentler on the batteries than 12.2.)
 
Last edited:

ghanwani

macrumors 68000
Dec 8, 2008
1,925
1,256
I just got my battery replaced because I had experienced this. It has made a big difference to both battery life and speed.

I was having trouble getting through the day and now I end the day with 30%+ even though battery health reported 90% capacity.
 
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