You can try power saving mode, but on the S7, power saving mode stops some apps from working properly, to save power. My Android System is using only 10% of the battery right now. That drain is not happening for me right now on the S7. On my S4 occasionally apps were sucking the life out the battery, dropping it 30% in 20 minutes of no use.
![samsung s7 battery drains fast after latest update samsung s7 battery drains fast after latest update](https://forums-images.oneplus.net/attachments/445/445478-26334647fae4e2b979952f784c441229.png)
I know 2 hours isn't long, but with battery drain, it's long enough to notice if it's happening. It was at 80% directly after the update, it's still there, and I've been on the internet, etc. It wasn't a major software overhaul, just a couple of bug fixes to touch and something else, and a bit of stability-fairly small and quick.
#Samsung s7 battery drains fast after latest update update#
I just took the bug fix update this morning, about 2 hours ago.
![samsung s7 battery drains fast after latest update samsung s7 battery drains fast after latest update](https://triadoro.com/wp-content/uploads/2016/10/samsung_galaxy_s7_edge_side-768x576.jpg)
Hope to hear from other users and especially telus. Whereas it would lose around 1% over night, the phone now loses more than 10% (around 7h sleep). The issue btw extends to the deep sleep of the phone. It's really frustrating, the battery life was amazing before. I would go as far as exchanging my phone for another unit even though I know Telus won't do it. Looks like a Samsung issue, however I still wanted to post here and a) read what telus has to say, b) warn people who have not made the update yet (ignore it for now!) and c) whether it is possible to revert to the February/factory version of the installed operating system without violating the warranty.
![samsung s7 battery drains fast after latest update samsung s7 battery drains fast after latest update](https://media.techietech.tech/2020/08/18-ways-on-How-to-fix-Samsung-S9-Battery-drain-problem-Banner-Image.jpg)
I've been reading online, mainly on xda, and many people are reporting this issue with Canadian, US and European versions of the phone. The processes/services 'Android system' and 'Android OS' now account for 25-50% of the battery usage, whereas before they were barely listed. Ever since the update, background battery drain increased significantly for me. I own the S7 and installed it right away. Telus recently (April 18) released the April update for the S7 and the Edge.