A growing number of Samsung owners say the company’s July 2026 security patch is to blame. Owners of the Galaxy S24 Ultra, S25 Ultra, and even the Galaxy Z Fold 7 describe battery levels dropping sharply with barely any actual use. One S25 Ultra owner said their phone went from 85 percent at midnight down to just 5 percent by midday, despite only around two hours of screen time. For phone owners dealing with it right now, that means there’s no official patch to point to just yet. It’s not the first time a Samsung software update has caused headaches for Galaxy owners, past updates have caused their own share of charging and performance complaints.