Messages app on iOS 10.0.2 issue (heavy battery drain !)

Hi pierrezep,
Thanks for updating to iOS 10.02! I understand that after the update your Messages app is using a very high amount of your battery. You can try to force quit the Messages app then relaunch. Force an app to close on your iPhone, iPad, or iPod touch
If this does not resolve the issue, try the tips in this link for maximizing your iPhone's battery life. Maximizing Battery Life and Lifespan
This should resolve your battery drain issues for sure! Thanks for using Apple Support Communities to post your question.
Have a great day.

To be honest its very nice that you point out the "Maximising Battery Life" link. However, as I am experiencing the messages App depleting my battery life rapidly I have checked out a lot of these guides and they are guides for normal running systems.

Messages draining the battery is a defect and this is not to do with maximising battery life on a system running correctly, what we require is a fix if it has been found. So turning off my location services and reducing my brightness will not fix the fact that messages is draining my battery....for sure!!!

Apologies for sounding harsh, but its rather an annoying fault on a usually marvellous piece of equipment.

IF you go into Preferences -> Privacy -> Location Services -> System Services you will see a culprit (if you have the Status Bar option enabled). The Compas calibration and Location based alerts constantly activate and deactivate. This

is on a brand new iPhone 7 that got great battery life on 10.0.1 - I usually got by for 48 hours between charges with moderate use (a few hrs web surfing and using 3rd party messaging). Even with the above workarounds i am watching my battery meter drop 3 percent as i type this. I did an OTA ipdate. I will be heading home to downgrade ipsw. I just lost confidence in Apples software QA. Apple staff who may read this, if you are going to nag us with daily OTA updates can you please do more extensive testing before pushing out minor point releases? This one really put a huge hole in my battery life and confidence in Apple quality.

Results - Using latest iTunes I did a "Backup" and "Restore Backup". The battery drain and accompanying Loc.Svcs (Compass Calibration excessive running) vanish for about 10 mins after the Restore (on same 10.0.2).

So then I used "Restore iPhone" with shift-click (windows) and restored 10.0.1. Its been 12hrs and no excessive Location Service activity and battery percentage has gone back to excellent. I am not sure the root cause and don't have another four hours to waste.

it will be a long time before I trust Apple iOS updates and will leave it in. 10.0.1..

A follow up to my other post - I am now back on iOS 10.0.1 and I have an iPhone 7... My device is named "WeziPhone5s" (I never bothered changing the device name after upgrading iPhone recently . Have a look at the following screenshot I just took on my iPhone 7:

THat screenshot was taken in Settings - Privacy - Location Services - Share my location. Notice how there are two identically named devices and "This device is not selected". This seems like another bug.. Judging from Pierre's problem and my observation of excessive Location Services activity, it seems there may be an iOS 10 bug related to Messages and Share My Location.. I am guessing the problem gets more severe on 10.0.2. A possible workaround is to disable "Share My Location" in Settings - Privacy - Location Services... Pierre (and others here reporting) can you please post a reply here informing if you have duplicate device names in this setting (Share My Location)? If so we might be getting close to identifying the cause of the battery drain problem...

weeasle, i may have had some luck addressing the issue! like you, my "share my location" screen showed two devices, one of which had a check mark i could do nothing about. i went back to the last phone that had been associated with my itunes account (in my case, it was my work iphone), turned off share locations on that device, then looked at the "share my location" screen on my iphone 7 again. both devices were still listed, but the old one no longer had a check mark next to its name. i was then able to delete that device from the list, and since then i have used messages without my phone heating up, even while on the charger.

if you still have access to your old phone, try turning off the shared location on that phone and see if it does the trick for you! i am not positive that this will totally solve the battery drain issue, but the phone staying cool while using messages seems like a very good sign.

Great news ! Thanks for sharing Afrosteel! I am posting links to this thread on other threads so that I can hopefully help others...

Had the Ghost iPhone too, looked first on my iPad and I had 2 iPhone5... tried to delete it from iPad and kept reappearing even though it was not the one selected... Went on my iPhone5, deleted the ghost iPhone5, and it disappeared from my iPad... Weasley, i think that either you found something or that the manipulations I made downgrading then coming back to 10.0.2 introduced that ghost !!!

Wow that is amazing news! I hope Apple read these (As it would be extremely time consuming to put in a Bug Report which would require replicating the circumstances while a logging profile is installed). Hopefully some Ace Apple programmers read this thread and take action... Thanks for Sharing..

I purchased an iPhone 7 Plus about a month ago- bad battery life from the start. About 2 weeks ago I was able to convince them that the phone was bad, so I got another new one. The battery was fantastic for about a week, then it went draining 4-6% an hour again just sitting idle. I wish I could figure out what I did to change it (maybe upgrade to 10.0.2?), but I've tried just about everything to fix it, including most of the items in this forum.

I've tried most all of the suggestions on the forums, including the ones here, but still have excessive drain. Any suggestions would be greatly appreciated!

Thanks.