Samsung’s latest software update might be doing more harm than good for some Galaxy users.
Following the April 2026 security update, owners of the Galaxy S25 and Galaxy S24 are reporting serious battery drain and overheating issues. Complaints are quickly piling up across forums and Reddit.
The issue appears to have started shortly after the update began rolling out earlier this month. Since then, users say battery life has dropped off a cliff. In some cases, it has dropped dramatically. One Galaxy S25 owner claims their phone is dying in just a couple of hours, while another Galaxy S24 user says their device now lasts under three hours and takes significantly longer to recharge.
It’s not just isolated cases either. Threads across Samsung’s community forums, and echoed on Reddit, paint a consistent picture. Users have described their battery performance as “trash” over the past few weeks. One says they’re now regularly hitting 20% by the time they get home, something that “never used to happen.” Others have simply said: “So it’s not just me.”
Digging into battery stats, some users believe they’ve found the culprit: Knox Matrix. The built-in security system detects threats and protects connected devices. However, it appears to be running constantly in the background and putting heavy strain on the CPU. Screenshots shared online show it consuming an unusually high amount of power compared to other system processes.
That could explain both the battery drain and the overheating reports. Knox Matrix is deeply integrated into Samsung’s ecosystem, so users cannot simply remove or disable it like a regular app. This makes this a trickier issue to work around.
So far, Samsung hasn’t officially acknowledged the problem. However, moderators on the company’s forums are advising affected users to visit service centres so technicians can investigate further. It’s also worth noting that the issue does not appear to affect every device, suggesting this could be a bug affecting certain configurations rather than a universal issue.
For now, if your Galaxy S25 or S24 has suddenly started burning through battery after the latest update, you’re definitely not alone. Also, it might not be something you can fix on your own just yet.
The post The latest One UI update is causing massive battery drain on the Galaxy S25 appeared first on Trusted Reviews.