Samsung Galaxy S24 and S25 Battery Drain After Latest Update – What You Need to Know

Samsung Galaxy S24 and S25 users are reporting severe battery drain and overheating issues following the April 2026 security update, with multiple sources linking the problem to increased activity from Knox Matrix.

The April 2026 security update began rolling out to the Galaxy S25 series on April 6, 2026 and expanded to the Galaxy S24 series around mid-April. Since then, a growing number of users have reported excessive battery drain and overheating on both device lines.

Some Galaxy S24 owners say their battery lasts less than three hours and takes up to five hours to charge fully, while Galaxy S25 users report their devices reaching zero battery after only two hours of use.

Multiple users have shared screenshots showing Knox Matrix consuming an unusually high percentage of battery power, leading many to suspect the security feature is the root cause of the drain.

User Reports and Community Feedback

Discussions on Samsung’s community forum and Reddit have highlighted widespread frustration, with users describing the battery performance as “trash” for weeks following the update. One Galaxy S25 Ultra user noted their battery had been poor for two to three weeks, aligning with the timeline of the update rollout.

Technical Context: Knox Matrix

Knox Matrix is Samsung’s end-to-end security framework designed to protect data across devices in a trusted ecosystem. While intended to enhance security, its increased background activity following the April update appears to be impacting battery life on affected Galaxy S24 and S25 models.

Response and Next Steps

As of April 24, 2026, Samsung has not issued an official statement or patch addressing the battery drain issue. Users continue to monitor community channels for updates, with some expressing hope that a future software fix will resolve the problem without compromising security protections.