Galaxy S25 and S24 owners report severe battery drain after April update

Samsung’s April 2026 security update started rolling out to the Galaxy S25 series on April 6. The update was later expanded to the Galaxy S24 series in the middle of the month. Since then, reports of battery drain and overheating have been increasing. Some users believe they may have found the culprit.

Galaxy S24 And S25 Owners have recently been flocking to the Samsung community forum to report excessive battery drain and overheating issues, which started after the April 2026 security update. It appears that the problem is quite serious, as some users claim that they are losing large chunks of battery life in just a few hours. A Galaxy S24 owner says their battery lasts less than three hours and takes five hours to charge to 100%. Meanwhile, a Galaxy S25 owner claims that his phone reaches zero after just two hours.

After checking their battery activity, many users are claiming that the Knox matrix is ​​to blame. In several screenshots, it appears that the Knox Matrix is ​​consuming more than its fair share of battery power. It appears that the app is constantly running in the background and putting pressure on the CPU.

If you’re unfamiliar with Knox Matrix, it’s part of Samsung’s security infrastructure. It plays a role in detecting threats, isolating damaged devices, and securely sharing credentials on Android. As a result, it is deeply embedded in the hardware and cannot be easily uninstalled.

Samsung has not yet publicly acknowledged the issue. However, community moderators are asking users to contact a service technician to gather more information. Android Authority Samsung has been contacted for comment.