Samsung Galaxy S24 and S25 Overheat and Lose Battery Life After April Security Patch

Key facts

• Samsung's April security patch released in early April 2025.
• overheating and drastically reduced battery life.
• One S24 user says battery lasts less than three hours and takes five hours to charge.
• phone dead after just two hours.
• Samsung's Knox Matrix security feature appears to consume excessive battery in background.
• Safe Mode and factory reset do not resolve the issue for affected users.
• Samsung has not confirmed the error or released a fix as of reporting.
• Not all users are affected; a Galaxy S24 in the editorial office runs normally.

April update triggers battery and overheating complaints

Samsung's April security patch, released in early April, is causing significant problems for owners of the Galaxy devices overheating and battery life plummeting after installation. One Galaxy S24 owner wrote in the Samsung community forum: “I charged it fully 35 minutes ago, its at 65% now. I've turned off everything. Turned on battery saver. Restarted. Ran a virus scan. Ran diagnostics. Nothing seems to cool it off.” Numerous users confirm similar experiences on Reddit and the Samsung community.

Knox Matrix suspected as battery drain culprit

Some users have identified the likely cause: Samsung's Knox Matrix security feature. Screenshots shared in forums show Knox Matrix consuming an unusually high proportion of battery power, running constantly in the background and overloading the CPU. The app can be closed, but it restarts. Factory resets also fail to stop the drain. doing both and still facing the same problem. The issue appears widespread but not universal; a Galaxy S24 in the editorial office runs normally after the same update.

Battery life plummets to as little as two hours

extreme battery degradation. An S25 Ultra user on Reddit complained: “My battery has been trash for a whole 2-3 weeks as a s25 ultra user.” Another Galaxy S24 owner states his battery lasts less than three hours and takes five hours to charge to 100%. An S25 user says the phone is dead after just two hours. Safe Mode, recommended by a Samsung community moderator, does not change anything, according to numerous user reports.

No official fix from Samsung yet

Samsung has not confirmed the error or issued a statement. The company has not released a patch to address the battery drain and overheating. Given the scale of complaints, analysts expect Samsung will have to release an update soon. However, as of now, there is no interim solution. Users are left with no effective workaround, as both closing the app and resetting the device have failed.

Impact on flagship models and user trust

The Galaxy S24 and S25 are Samsung's flagship devices, and such issues can erode user trust. The problem comes at a time when Samsung is competing fiercely with Apple and other Android manufacturers. The April security patch was intended to enhance device security, but instead it has compromised core functionality. The incident highlights the risks of automatic updates and the importance of rigorous testing before deployment.

Outlook: Samsung likely to release emergency update

With no fix in sight, affected users are growing frustrated. Samsung will likely have no choice but to release another update as soon as possible to resolve the known problems. The company's silence may indicate that it is still investigating the root cause. Until then, users must endure poor battery life and overheating, or consider alternative measures such as disabling Knox Matrix if possible, though no reliable method has been confirmed.

The bottom line

• Samsung's April security patch causes overheating and severe battery drain on Galaxy S24 and S25.
• Knox Matrix is identified as the likely cause, running constantly in the background and overloading the CPU.
• Battery life drops to as little as two hours for some users; charging times increase dramatically.
• Safe Mode and factory reset do not fix the issue.
• Samsung has not confirmed the problem or released a fix.
• An emergency update is expected soon to address the widespread complaints.