July 2016 update killing battery

Hi @emilylf!

Thank you for posting your battery concerns and welcome to the AT&T Community Forums!

I’m sorry to hear your battery is not working as expected after the update. I know how frustrating that can be. The update should improve the battery and not lessen it.

We have a fantastic Troubleshoot & Resolve Tool  that will help get the battery issue resolved quickly and easily. Once there, please select the make and model of your phone, and then click Power & Battery, then select next and Battery won’t hold / drains quickly.

It will walk you through steps to ensure your battery is working at the best performance and avoid the quick drain that’s happening now.

Please let me know if this works and have a great day!

Tom, AT&T Community Specialist

Galaxy S6 was never known for great battery life to begin with. IMO the cell inside of it it is way too small for such a power hungry processor. That Exynos CPU is beefy and that dinky little 2550MAH battery is weak for such a flagship device. Glad in the S7 they bumped the battery up to a bigger size.

First thing I would do is to wipe the cache partition then completely factory reset the phone. Before I installed a single third party application or restored any data I would use it for a day to see how it does with a minimal, stock setup. What I mean is no third party apps, photos on the storage, etc. Yes do adjust settings such as brightness and so forth and see how it goes.

I just got the at&t update on my Galaxy Note 4 last night.  I normally go a day and drop down to 50% at the most of battery before I get home from a 7a-4p job.  Today I was down to 20% by lunch time which was 11a.  I did not do anything differently.  Went through the troubleshooting steps and I will try when I get home.  I just do not see a day difference something this drastic has changed except except blaming the udpate.  All I can think is maybe time will tell if there are others that add on to this forum in the next few days.

All I do on a days work with my phone:

Check email - not getting anything out of ordinary

Text messages - actually getting less today

ESPN notifications - normal amount today

Facebook check at lunch on work days - did not even attempt today since battery low

I have the settings with a 1 min inactive turn off

I have the lighting as auto

Right now I am having to use the Ultra power saver to keep just charge

@Rbmadison @TreRob @lisa22

Did you follow the above advice?

First try clearing the partition cache.

If that doesn't help, backup and perform a factory reset.

One or the other will fix 95% of battery problems.

Here's the cache partition flush/clear instructions for the S6, posted by ATTCares on another thread (there doesn't apear to be a tutorial, although almost any phone with the same series would be the same reset procedure):

• Turn off the phone
• Press Power, Volume Up and Home simultaneously
• Wait until the phone vibrates and then release Power and Home
• You should now see the recovery screen. Use the volume buttons to move and select Wipe Cache Partition.
• Press the Power button to confirm.
• Select Reboot System Now and again, hit Power to confirm.
• Wait until your S6 Edge reboots and hope it’s fixed the problem.

*If this (or another post in this thread) fixes your problem/issue, please mark it as solved, and I'll tag it, to make it easier for others to find the answer(s). Thanks.