Galaxy S24 and S25 owners report battery drain after One UI 9
Some Samsung Galaxy S24 and S25 users say One UI 9 causes unusually fast battery drain, with some charging three to four times a day. Samsung has not confirmed a software defect or named a cause; one S24 Ultra owner lost 95% of charge over 5 hours 20 minutes.
- Complaints surfaced on Reddit, Samsung's forum and X after One UI 9 rollout
- One S24 Ultra lost 95% charge in 5h 20m, including 3h 15m of screen-on time
- Samsung has not confirmed the bug or given a fix timeline
- A 2026 UserTesting study found 78% of US respondents delay updates unless necessary
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