Is there any chance to downgrade firmware from 6.1 to 5.1.1 ?

[evaldes]

The phone's battery life has significantly decreased, resulting in a maximum usage time of 10 hours before requiring a recharge.

[Fiona26]

Unfortunately not possible to downgrade firmware. I also have the s23 ultra and I'm not experiencing any battery drain. How ever a few things you could try. Wiping the phones cache partition. Then run app booster in good guardians. If you still experience battery drain, back up all important data. Factory reset.

[evaldes]

Following a factory reset, the device will revert to the most recent software update, which is version 6.1.

[evaldes]

Thx anyway 🫡😀

[Fiona26]

It will, but factory resetting may help with your battery drain. I have the s23 ultra on 6.1 I have no issues with battery drain. Try the wiping cache partition first. If no luck maybe a factory reset will.

[Robin999]

Hi, Unfortunately, there's no (official) way to downgrade the OS, so you're stuck with it. The upgrade to UI 6.1 brought with it some battery intensive AI features that will have an impact on battery life. Disabling the AI features you don't use or need may improve battery life. If you've only upgraded in the last couple of days, then It's possible the battery usage algorithm has kicked in, and it's still in its learning phase. If so, then give it a week to stabilise.
As advised by @Fiona26, I'd also recommend a partition cache wipe

Plug into a working PC or laptop or other Samsung device

https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/

I can also recommend using the Good Guardians app, which you can get from the Galaxy store. Use the App Booster feature to optimize all of your apps. Recommended after any major update.

[evaldes]

Yes, I've just done it yesterday, and that's what I thought because of AI. Thanks for ur time answering

[Piper123]

Extensive battery usage usually comes down to an app using more as it hasn't been optimised for the OS.

Would recommend you review what is using your battery, run device care from settings, clear cache and from Samsung run the diagnosis tool.

[smg1]

Perfectly explained Fiona. I do this regular on all my phones and family members phones and none of use have any issues.

[Gulf_OTM]

This is a late reply, but you can use odin to downgrade the firmware version. I recommend using SamMobile for firmware and guides.