iOS 8.4 battery drain

I too am noticing Battery Life dropping off a cliff since iOS 8.4 update.

Originally, I updated OTA and it was pretty horrific. So, I backed up, restored and re-installed via iTunes update ... it's better but still nowhere near the decent performance I was getting out the Battery on 8.3.

Has anyone else experienced this ? Has anyone found a fix ?

I've got everythign tweaked in the background to minimise usuage eg. Background App Refresh Off, Frequent Locations Off etc etc.

Any help appreciated ....

Using the battery level meter in this manner is comparable to using your car's fuel gauge to calculate miles per gallon. The only thing that matters is the total amount of operating time from full charge to auto-shutdown.

Use the wall-mount charger that came with the iPhone and charge overnight. Do NOT use a computer's USB port. Then, operate it normally until auto shut-down (ignore any low level alerts that may appear). An irony is that doing that test to determine the total operating time is also the procedure necessary to calibrate the battery level meter.

I'm not claiming that you do not have a problem. I am stating, however, that we don't yet know. If the above test does, in fact, indicate a problem, read this.

Also, according to Apple:

Use Your Device Regularly

For proper reporting of the battery’s state of charge, be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down).

Elsewhere, Apple elaborates and explains that two half-discharges (or four quarter-discharges, etc.) equals one full discharge.

Redski wrote:

Originally, I updated OTA and it was pretty horrific. So, I backed up, restored and re-installed via iTunes update ... it's better but still nowhere near the decent performance I was getting out the Battery on 8.3.

It's the same update.

Are you sure that's the case OTA vs iTunes ? Apple Support have previously given the following advices on this matter ...

" The OTA updates provide a Delta update only, while iTunes provided the whole build. Deltas include small size while whole build unpack the big file using PC or Mac. Updating via iTunes the file size is completely different. "

" If there is a problem after installing the delta update OTA, restoring the iPhone with iTunes to install the whole build for the update may resolve the problem. The most common problems are: Battery life, Wi/Fi Problem, BlueTooth Issue, or Software Bug. "

So this indicates they aren't the same ?

I've tried fully cycling a charge on the Battery to ensure I'm comparing Apples with Apples and iOS 8.4 has definitely had a degradation imnpact to my Battery Life, as it stands.

Redski wrote:

Are you sure that's the case OTA vs iTunes ? Apple Support have previously given the following advices on this matter ...

" The OTA updates provide a Delta update only, while iTunes provided the whole build. Deltas include small size while whole build unpack the big file using PC or Mac. Updating via iTunes the file size is completely different. "

" If there is a problem after installing the delta update OTA, restoring the iPhone with iTunes to install the whole build for the update may resolve the problem. The most common problems are: Battery life, Wi/Fi Problem, BlueTooth Issue, or Software Bug. "

So this indicates they aren't the same ?

That does indicate that my contention is incorrect. Where did you get those words from?

Apple Technical Support .... always happy to impart some wisdom and sprinkle some value dust 😉

This is really old Battery Saving tips. As stated in Original Post - I've done all this (eg. Frequent Locations, Motion Tilt etc etc) and in iOS8.3 it was fine - same settings in iOS 8.4 = battery dropping off a cliff.

So, in summary - battery saving settings are same between iOS 8.3 & 8.4 for me - only variable is the iOS version and I've noticed a total change in battery Performance.

Please is someone else able to offer some more relevant / meaningful advice ?

Interested to hear if others are too experiencing a noticable difference ...

Thanks.

How much operating time to you get from full charge (overnight) to automatic shutdown?

I'm experiencing no difference in battery life between 8.3 and 8.4. Usually if you see a change in battery life it is due to some app that is stuck in a loop, frequently trying to update and failing. It can happen at any time, whether you have just updated, or not. But it seems to be more common after an update, possibly because the update suspended the app in the middle of some process, and it did not recover correctly. This is not a new issue; if you look at the forum archives you can find posts after every update that has come out in the past 7 1/2 years asking if the update is responsible for a change in battery performance.

It's a pain, but the best thing to do is to try to find the app that is misbehaving. Also, if you did an OTA update, the first step should be to redo the update using iTunes. The OTA update is a "patch" update; it just replaces parts of the code that have changed. An iTunes update downloads a complete iOS image and installs it. Sometimes this makes a difference.

I will try to add some weight to this being a problem. For me. charge overnight on Apple charger, off charge around 6:30am, typical usage means battery on 30-50% when I put it back on charge around 11pm. Upgraded to 8.4. Phone dead by 4pm. Did a full recover, full install via itunes. Full charge overnight. Today I have pretty much just left the phone alone.

The usage monitor recently said:

Usage 27 mins (just looking at screens, running no apps or email etc)

Standby 3 hours 16 minutes

and I have 50% battery left!!!!!!

I had NO app updates happen. I have no looping Apps. I work in IT and am used to problem solving. The only change has been 8.3 to 8.4. I get fed up with being told it's something else.

What is Apple going to do? I have a £600 product that is now worse than useless. The only other problem I have had since 8.4 is the phone keeps saying my Apple cables and approved dock are not Apple ones!

PS 35 mins later and battery now reads 40% and phone is warm, there are no apps running, it's got a full 3g signal and full wifi.

APPLE PLEASE ACKNOWLEDGE AND FIX THIS VERY REAL PROBLEM!

I have not done anything on the phone, it's now been 5 hours 10 mins since it was fully charged and I have 16% battery left. Biggest battery user is - Home and lock screen at 32%. Oops, now 14% I will let you know when it dies.

Since doing the update I am losing 1% per minute and the phone is really hot and that's when I'm not using it. I charge fully from the socket each time. It wasn't half as bad as this before I did the update..... come on Apple!

Yep, just died. I saw 2% on the screen and few minutes later it was gone. That's 6 hours on standby with good signal and almost no use other than occasionally looking at the usage screen and one diary entry. ios 8.4 has issues! And I no longer have a phone that fulfills its purpose!