topic Battery drain after iUI 8 update in Galaxy S25

Samsung s25 charging and battery drain issue

joel1234567 — Sun, 25 May 2025 23:06:42 GMT

Hey is anyone having a issue with really bad battery drain on the s25 could barely get 3 hours on it and its not any app draining the battery quickly and secondly for some reason when I power off the phone and power it off it pulls 21 watts the fast charging but when turn it on it only does 8 watts this is at 4% by the way. Please help thanks

Re: Samsung s25 charging and battery drain issue

SamsungMod — Mon, 26 May 2025 20:51:10 GMT

Hello joel1234567, Thank you for being part of the Community. We understand the concern of experiencing the charging and battery drain issues.

Here is an article that provides troubleshooting for charging concerns: https://www.samsung.com/uk/support/mobile-devices/my-device-is-charging-slowly-not-switching-on-or-keeps-restarting/

We have a solution thread for battery drain here: https://us.community.samsung.com/t5/Galaxy-S25/Battery-Draining-on-S25-Ultra/m-p/3225903#M21929

We also recommend running the Diagnostics and Submitting Feedback under the Support Tab in the Members App.

If the troubleshooting does not help, it is recommended to have the phone serviced. You can use the following link to find a list of service centers in the U.S. that can do the repair: http://www.samsung.com/us/support/service/location or by contacting customer support at 1-800-726-7864.

For international customers, please use this link: https://www.samsung.com/us/common/visitlocationsite.html

Battery drain quick s25 ultra

Jag1021 — Thu, 07 Aug 2025 18:19:05 GMT

I been noticing lately that the battery on my S25 Ultra drain quickly. I try to close all most of the apps I don't use. Im on wifi when im at work or home. Don't play games. So what would be the problem.

Re: Battery drain quick s25 ultra

Youu — Thu, 07 Aug 2025 19:02:56 GMT

Clear the cache and run galaxy app booster from good guardians and your battery life should be really good

Galaxy S25+ Battery Drain - Barely Lasting a Day on New Phone

nazmulhasan — Wed, 17 Sep 2025 05:36:56 GMT

Hello,

I'm having issues with the battery life on my new Galaxy S25+, which I just bought 5 days ago. I'm getting very low screen-on time, sometimes only 3-4 hours, and the battery drains very quickly in the background even when the phone is idle. This is disappointing because online reviews from places like Tom's Guide, GSMArena, and YouTube all show this phone having great battery life.

I'm trying to figure out the cause. When I set up my phone, I used Smart Switch to transfer everything from an old OnePlus 8T. I am also using many features from the Good Lock app, but I am not using the Always On Display (AOD). Additionally, I have my Amazfit Zepp watch connected and use Google Health Connect with Samsung Health.

Could using Smart Switch from a non-Samsung phone, or my health app connections, be the main reason for this high background drain and low screen-on time?

Any advice would be appreciated. Thanks!
@LongHiker @realaud @GaryB82
Sorry if I mentioned the wrong person.

Re: Galaxy S25+ Battery Drain - Barely Lasting a Day on New Phone

LongHiker — Wed, 17 Sep 2025 14:25:45 GMT

@nazmulhasan If you have only had the phone for 5 days, it is still learning your usage patterns. Battery performance will increase as the device learns your usage patterns. Also, when the phone is new there is a lot of configuration and initializations that need to occur.

Re: Galaxy S25+ Battery Drain - Barely Lasting a Day on New Phone

realaud — Wed, 17 Sep 2025 14:32:17 GMT

It's a new phone, it's still getting set up and learning your battery usage patterns. You used Smart Switch to transfer your stuff over, which would/should have no effect on battery drain. However, all the apps you transferred over may now be looking to update in order to be compatible with your new phone. Wait another week and see if you are still having the same issues. In the meantime check, not only the apps using screen time, but what is running in the background. Check the battery stats to see which are the top 3 or 4 apps using the battery and see if they are able to be optimized or put to sleep. The screen on the S25 is amazingly bright, so you likely do not have to keep the brightness level at maximum, try lowering it to 75% or to the lowest level where you can still see it clearly without it looking too dim. Now that your battery is a week old, it's time to clear the phone's cache partition to get rid of all the flotsam of any app/system update temp files.

Battey life on One UI 8

PacoSeg2025 — Thu, 25 Sep 2025 08:04:48 GMT

My battery has taken a nosedive since I upgraded to One UI 8 on my S25 Ultra. Is anyone else having this problem?

Re: Battey life on One UI 8

Mamdouh — Thu, 25 Sep 2025 08:50:22 GMT

Updating a major update need ur phone to be cooled down and charged 60%+ and still on charger

Re: Battey life on One UI 8

Tom6068 — Thu, 25 Sep 2025 09:49:17 GMT

Clear your system cache.

Power down the device.

Press and hold both the up volume and power (side) buttons at the same time until you get the Samsung screen.

Release the buttons when Samsung screen disappears, then you will get the recovery screen.

Using the volume buttons, move the highlight up/down to "Wipe cache partition", then click the power button.

Use the volume button to choose "Yes", click the power button,

Highlight will be over "Reboot system now" just click the power button again to restart device as normal.

See how that works.

Re: Re: Battey life on One UI 8

PacoSeg2025 — Thu, 25 Sep 2025 09:50:43 GMT

Thanks for the advice. I did that yesterday.

Re: Re: Battey life on One UI 8

Tom6068 — Thu, 25 Sep 2025 10:03:14 GMT

Open the device care app, click on the battery section, then see which apps are running. One or two may be running whether in use or not. You can individually restrict them from running after they are no longer being used at the time. Also, I recommend downloading Good Guardians app form the Galaxy Store, then installing the Battery Guardian and use it settings. e,g, Toggling on the "App power saving" function will auto-place an app into sleep mode that is a battery hog.

Re: Battey life on One UI 8

realaud — Thu, 25 Sep 2025 14:02:13 GMT

As with any other update, the adaptive battery needs to relearn your usage. I imagine some of the new features expend a little more battery power, but it should not be significant. As @Tom6068 suggested, take a look at your battery usage and see which apps are using the most and why (background or screen on), then check their optimization settings to either restrict or optimized.

Experiencing battery drain on One UI 8

IvanYackinOff — Thu, 25 Sep 2025 15:47:28 GMT

So this is my very first galaxy phone (switched from iphone) im loving it but im having issues with the battery. Im on one ui 8 and i understand it JUST came out, does anyone know if its buggy when it comes to battery life? Its draining faster than my iphone and i know a 5k mah battery can perform better

Re: BATTERY

CEParsons — Thu, 25 Sep 2025 14:56:17 GMT

Galaxy phones have an adaptive battery feature that uses machine learning to optimize battery consumption based on your usage.

After a major software update, this feature resets and needs to relearn your usage patterns. You may notice diminished battery life for a week or so while this process takes place.

Re: Re: BATTERY

IvanYackinOff — Thu, 25 Sep 2025 15:05:07 GMT

Yeah ive got adaptive battery turned on. I believe my battery is done optimizing? I got this phone on sunday morning and everyday it said learning battery usage up until this morning. Now it tells me how much time my battery has left but i still dont see much of a difference on how long it last

Re: Re: Re: BATTERY

CEParsons — Thu, 25 Sep 2025 15:30:33 GMT

Adaptive battery continuously learns and optimizes, even after the initial "learning" phase is completed. Sun - Thurs is not really a substantial amount of time for your device to develop and analyze a data set of your usage patterns (especislly considering the first few days of setup are exceptionally resource/battery intensive.) Over time, you will notice your device doing things like putting certain apps into deep sleep to conserve battery.

Have you followed the best practices after an update guide? Clearing device cache via recovery mode in particular.
https://us.community.samsung.com/t5/Tips-Tricks/Best-Practices-After-an-Update/ba-p/3200871?src=ShareByUserCM

You can also download Good Guardians to re-optimize your apps via app booster (something you should definitely do after a major update). Battery Guardian also offers several options to extend your device's battery.
https://apps.samsung.com/appquery/appDetail.as?appId=com.android.samsung.utilityapp

Hope this helps!

Re: Re: Re: Re: BATTERY

IvanYackinOff — Thu, 25 Sep 2025 15:55:57 GMT

Thank you ill be trying these out right now. I also have a question about lagging/micro stuttering during youtube or netflix almost any social media app

It seems like a "frame drop" any idea what that could be?

Re: Re: Re: Re: Re: BATTERY

CEParsons — Thu, 25 Sep 2025 16:02:04 GMT

May or may not be an app optimization issue. Re-optimizing via App Booster may help, but I can't say for sure. Could also have to do with the adaptive refresh, dynamic switching.

Can't say I have experienced what you're describing

Re: Experiencing battery drain on One UI 8

lizzy64 — Thu, 25 Sep 2025 22:49:13 GMT

You can also check your battery usage to see if any apps are draining your battery excessively.