Some Samsung Galaxy S24 Ultra and Galaxy S25 Ultra users are reporting severe battery drain and overheating after installing the July 2026 security update, with many claiming the issues began immediately after updating their devices.
According to complaints shared on Samsung’s Community forum, affected users say their phones are losing battery much faster than usual, even while sitting idle. However, the issue does not appear to affect every device, and Samsung has not officially acknowledged the reports.
One Galaxy S25 Ultra owner claimed the battery dropped from around 85 percent at midnight to nearly 5 percent by midday despite recording only about two hours of screen-on time. The user said the device was losing between 5 and 7 percent battery every hour while idle and also became unusually warm.
Similar complaints have also been reported by Galaxy S24 Ultra users. Some owners said their phones could no longer last a full day on a single charge despite unchanged usage patterns. A few users also reported similar issues on the Galaxy S24 Plus, including slower charging speeds after the update.
Affected users said they had tried common troubleshooting methods, including clearing cache files and restarting their devices, but the battery drain and overheating continued. Many have submitted diagnostic logs and reports to Samsung in hopes of identifying the cause.
Not all users have experienced the problem. Reports indicate that some Galaxy S25 Ultra devices continue to deliver normal battery performance after installing the July security update, suggesting the issue may be limited to certain devices or software configurations.
Samsung has not yet confirmed the cause of the reported battery drain or overheating and has not announced whether a software fix is under development. Earlier this year, the company resolved a separate charging issue affecting some Galaxy S25 Plus and Galaxy S25 Ultra devices through a software update, raising hopes that a similar solution could be released if the current issue is confirmed.
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