Samsung Galaxy S24 and Galaxy S25 users are reporting serious battery drain and overheating problems after installing Samsung’s April 2026 security update. The issue has gained attention across Samsung Community forums, Reddit discussions, and tech news outlets, with some users claiming their phones are losing battery unusually fast even with normal use.
The problem appears to affect both Samsung Galaxy S24 and Galaxy S25 models, although not every device owner is experiencing it. Reports suggest the battery drain started after the April 2026 security patch, which was rolled out to recent Galaxy flagship phones earlier this month. Android Authority reported that Galaxy S25 and S24 owners began posting complaints after the update, with some users saying their phones became hot and lost large amounts of battery within only a few hours.
What Users Are Reporting
According to user complaints, the main symptoms include:
- Battery draining much faster than usual
- Phone heating up during light use
- Battery percentage dropping quickly while idle
- Slower or longer charging time
- High background activity from system services
Some Galaxy S24 users have claimed their phones are lasting only a few hours after a full charge. Similar complaints are also appearing from Galaxy S25 users. Heise reported that users are mainly complaining about overheating and significantly reduced battery life after the April security patch.
This makes the issue more serious than normal post-update battery adjustment. Usually, a phone may use extra battery for a day or two after a major software update because the system re-indexes apps, files, and background processes. However, many users are reporting that the problem continues for several days.
Is Knox Matrix Causing the Battery Drain?
One possible cause being discussed is Knox Matrix, Samsung’s security feature designed to protect connected Samsung devices across an ecosystem. Multiple users have shared screenshots showing Knox Matrix using an unusually high amount of battery in the background. Android Authority noted that some users believe Knox Matrix may be overwhelming the CPU and running continuously after the update.
Samsung describes Knox Matrix as part of its connected-device security system, designed to allow devices in a user’s ecosystem to monitor and protect one another. Samsung has previously explained that Knox Matrix helps create multi-layered protection between connected devices.
However, it is important to be clear: Samsung has not officially confirmed Knox Matrix as the cause of the Galaxy S24 and S25 battery drain issue. At this stage, it remains a suspected cause based on user reports, not a confirmed technical explanation.
Samsung Has Not Confirmed an Official Fix Yet
As of now, Samsung has not publicly confirmed the battery drain problem as a known bug. Android Authority reported that Samsung had not yet publicly acknowledged the issue, while community moderators were asking some users to have service technicians inspect affected devices.
Samsung’s official security update page says the company releases monthly, quarterly, and biannual firmware security updates for selected Galaxy devices. The Galaxy S24 and Galaxy S25 series are listed under Samsung’s monthly security update models, meaning they regularly receive patches for Android and Samsung-specific security issues.
SamMobile also reported that Samsung began rolling out the April 2026 security patch to the Galaxy S25, Galaxy S24, and Galaxy S23 lineups, with the update fixing 47 security issues.
What Galaxy S24 and S25 Users Can Do Now
Until Samsung releases an official fix or statement, affected users can try a few safe troubleshooting steps:
Check Battery Usage
Go to:
Settings > Battery > Battery Usage
Look for apps or services using unusually high battery. If Knox Matrix or another system process appears at the top, take a screenshot. This may help if you contact Samsung Support.
Restart the Phone
A simple restart may stop stuck background processes. It may not solve the issue permanently, but it is worth trying before making bigger changes.
Update Samsung Apps
Open the Galaxy Store and update all Samsung apps. Also check the Google Play Store for app updates. Sometimes battery drain can come from outdated background services after a firmware update.
Try Safe Mode
Samsung Community moderators have suggested Safe Mode for some users. Safe Mode can help identify whether a third-party app is contributing to the battery drain. However, reports suggest this may not solve the issue for everyone.
Avoid Factory Reset Unless Necessary
A factory reset should be a last option. Heise noted that some users reported the problem continuing even after closing the suspected app or resetting the device.
Should You Install the April 2026 Update?
If you have not installed the April 2026 update yet, the decision depends on your situation. Security updates are important because they fix vulnerabilities and protect your device. Samsung’s April patch reportedly includes fixes for multiple security issues, so delaying updates for too long may not be ideal.
However, if your Samsung Galaxy S24 or Galaxy S25 is currently working normally and you are concerned about battery life, you may want to monitor Samsung Community posts and official update notes before installing, especially if the update has not yet been forced on your device.
Final Thoughts
The Samsung Galaxy S24 and Galaxy S25 battery drain issue appears to be linked to the April 2026 security update, based on a growing number of user reports. The suspected cause may be Knox Matrix or another background system process, but Samsung has not officially confirmed the reason yet.
For now, users should check battery usage, update Samsung apps, restart their devices, and avoid risky fixes. The safest approach is to wait for Samsung’s next update or official statement while keeping a record of battery behavior.
The issue does not seem to affect every device, but for users facing overheating and fast battery loss, it is clearly more than a small inconvenience. If the reports continue, Samsung may need to release a follow-up patch to restore normal battery performance.
FAQs
Why is my Samsung Galaxy S24 battery draining so fast?
Many users are reporting battery drain after the April 2026 security update. Some reports suggest Knox Matrix may be using too much background power, but Samsung has not officially confirmed the cause.
Is the Galaxy S25 also affected?
Yes. Reports mention both Galaxy S24 and Galaxy S25 users facing battery drain and overheating after the April 2026 update.
Has Samsung released a fix?
Not yet. As of April 30, 2026, there is no confirmed official fix from Samsung.
Should I factory reset my Samsung Galaxy S24?
A factory reset is not recommended as the first step. Try checking battery usage, restarting the phone, updating apps, and contacting Samsung Support first.
Is this a hardware issue?
Current reports suggest the problem may be software-related because many complaints started after the April 2026 security update. However, Samsung has not confirmed the exact cause.