IPhone 5S with iOS 8.0.2 battery draining rapidly
I have an iPhone 5S with 8.0.2 recently installed on it. Normally, I can go a whole day and have the battery around 50 - 60% when I put it back to charge it at night. However, lately, the battery has been draining so fast that it doesn't last an entire day anymore. My usage has not changed. If I look up the battery drainage for the last 4 hours, the major players are Mail (28%), Home & Lock Screen (17%), and Facebook (13%). For the last 4 days, it has been Mail (41%), Home & Lock Screen (15%), and Safari and Facebook (11% each).
I had this problem with iOS 7.1.2, and I took it in to the Apple store and was instructed to delete and install Facebook again. I did this, and it didn't help. I then restored the phone and re-installed the back up. That worked until about a week after I installed iOS 8. I tried upgrading to 8.0.2, and the drain was faster if it changed at all. I tried restoring from the backup again, and this time it didn't help. My last option would be to restore as a new phone, but I'd like to avoid this if possible. It would take more time than I really want to spend on it.
My background refresh apps are limited to just a few. I also have the Mail program set not to notify me unless I get a message from a certain account or a VIP. I also limit what can use location services. Also, since mail was consuming the battery, I tried to decrease the frequency of retrieval, and even changed it to manual. Neither option helped the battery life.
I wonder if something is wrong in the OS that is causing this. Does anyone have an idea?
Hey David Ancell,
Thanks for the question, and great troubleshooting so far. You have already taken all of the most applicable steps: optimizing your settings, viewing which apps are using energy, and configuring your notifications. Because restoring the back up of your iPhone may restore the culprit causing these symptoms, restoring as new is your best option for isolation purposes:
iOS: How to back up your data and set up your device as a new device
http://support.apple.com/kb/HT4137
After erasing and setting up as a new device, your device is now in a factory configuration. Test to determine if erasing and setting up as a new device resolved the issue. Content on the device may have caused unexpected behavior.
If the issue is still present, you may want to contact Apple Support.
Additional Information:
Apple - Batteries - Maximizing Performance
http://www.apple.com/batteries/maximizing-performance/#ios
Thanks,
Matt M.
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