Overview
- Owners of Galaxy S24 Ultra and S25 Ultra began reporting sharp battery loss, overheating and slower charging after installing Samsung’s July 2026 security update.
- Users posted screenshots and diagnostic logs on Samsung Community forums and Reddit that show large idle power use and sustained CPU activity on affected phones.
- Several reports traced extreme drain to misbehaving background apps, including WhatsApp getting stuck during backups, suggesting some cases are app-driven rather than hardware failures.
- Affected owners say temporary workarounds such as clearing the system cache partition, restricting background apps or testing in Safe Mode have helped some phones.
- Samsung has not publicly acknowledged the reports yet, and coverage and past precedent point to a forthcoming software patch or future One UI/Android update as the likely fix.