Some Galaxy S24 and S25 owners say Samsung's One UI 9 update cut their battery life sharply. Reports are limited so far, but a few checks are worth doing.
Some Galaxy S24 and S25 owners say their battery life got much worse after installing Samsung's One UI 9 update. One S25 owner says they now charge the phone 3 to 4 times a day. Others report the same problem.
One UI 9 is Samsung's software for its Galaxy phones, built on Android 17. It has been rolling out more widely, and complaints have followed. One report says a phone died in just over 5 hours, though that was heavy use. Reddit posts also describe more battery drain while the phone sits idle.
This looks like the exception, not the rule. The reports are not widespread, and there is no flood of users describing the exact same problem. Big system updates sometimes misbehave on older models, and battery drain after an update is a familiar pattern. If your battery is fine, there is no sign you need to do anything.
If you own an S24 or S25 and have updated, watch your battery over the next few days. The steps in the alert box above are the easy fixes to try before assuming the phone itself is failing.
The reports do not say what is causing the drain, how many phones are affected, or whether a fix is coming. Anyone who has not updated yet may want to wait and watch for more reports.
After updating a Galaxy S24 or S25, watch your battery and try the easy fixes first; if you have not updated and all is well, waiting is reasonable.
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