Short battery live after updating Galaxy S8 to G950WVLS5BSA1

[issamal]

I recently updated my S8 and the battery charge is lasting 40 percent less! How can I reverse this update? If I can't  I will defenitly replace galaxy with a Pixel and will never go back to use Samsung . 

[Shaggyskunk1BLM]

Did you at least Boot into Recovery and Wipe Cache? I Booted into Recovery and Wiped Cache & Performed a Factory Reset - Before & After applying the One UI update 🐧
If you are bound & determined to go backwards to Oreo - Then you will have to Download the Samsung Firmware as well as Odin 3.13.1 and Flash the old Firmware yourself... 🙄

[bigpapac]

I have had no issues with my battery life. may actually be better. is it possible you are using your phone more for some reason?

[Vic20]

No, I think it's an issue post install with some weird conflicting system file or incompatible app draining battery. I'm experiencing the same thing now. 5 hours in and my Note 8 battery takes a nose dive down to 30%. Will definitely need to nuke and spring clean my Note 8 soon. 😛