[Galaxy S25 Series] How to fix Knox Matrix draining battery and overheating phone

[Sergio_Blanco]

Knox Matrix is draining the battery and overheating the phone. Impossible to work that way. I hope that Samsung publish an update soon to fix this. I'm concerned that the battery can start expanding or leaking because it is to hot and i need to keep the phone charging to go thru my work shift. Really bad situation...

[Jade42]

Back in October of last year I updated my phone to UI 8 and the battery has been horrible since then has this happened to anyone and is there a way to fix it?

[meself]

Clearing the phone cache is recommended after updates as for the battery it tends to be abit bad for week or so as it relearns your habits I havent noticed any real bad difference in battery

[Mujibar]

I made this post when people were having battery issues after the One UI 7 update. You might find some helpful information there:

https://us.community.samsung.com/t5/Galaxy-S-Phones/Battery-drain-on-One-UI-7/td-p/3220005?src=Share...

[JayyT]

My battery life is HORRIBLE now. The phone also gets hot on the left side when I'm holding it. I've cleared the phone cache and nothing has changed. My phone doesn't even last half a day anymore

[user0Wx4UcjHxo]

the admins deleted my post, but i was having 40% battery drain every night for no reason, even with every app put on deep sleep and the screen turned off. but i was able to solve it. settings -> general management -> reset -> reset all settings (not a factory reset). it kept all my files and apps, just had to log back in to wifi and enable bluetooth again. battery drain is now 4% per night. the admins wanted me to pay for repairs instead of troubleshooting.

[Hayyy]

My battery will randomly drop from around 70% to 20%, but in battery usage it doesn't show a specific app causing the rapid draining. Also my camera fails to open. (unsure if the 2 are related). 

[huskermania99]

On S23 ultra. Sudden battery issues. Will not hold a charge long, will have sudden drops of 10%. Was happening right as the last security update. Ive tried all kinds of troubleshooting outside of battery cache partition since its no longer available. Are we waiting for an update? Contacting support? Replacing batteries? Not really wanting to upgrade if I don't have to 

[CEParsons]

It's possible that your battery issues are associated with a recent update, but it is also worth considering that the S23U is now 3 years old. It is typical for Li-ion phone batteries of that age to have degraded to some extent.

You can run a battery diagnostic in the support tab of the members app to check the reported state of your battery.

Your most likely next step is having the device diagnosed at a certified Samsung repair center and performing a battery replacement if necessary. Find one near you: https://www.samsung.com/us/support/service/locations/

[huskermania99]

The battery comes back as "good" in diagnostics. I got mine in September 2023. With it being a sudden issue, im worried about it being a software issue that replacing the battery won't fix. However open to your feedback and knowledge.

[CEParsons]

Actual battery failure is notoriously difficult to accurately detect from a software standpoint. Device diagnostics can sometimes come back clean in spite of an underlying issue and aren't always the best indicator.

It could certainly be software related. Adaptive battery feature may have also reset, though I wouldn't expect that after just a security patch. Abnormal battery drain can occur in the 7-14 days following an update.

However 10% in a matter of minutes would typically indicate a hardware failure. If the issue worsens or persists beyond the recommended waiting period, service center is your best bet.