Samsung Galaxy S25 Ultra Battery Drain Hits Users After July 2026 Update

Samsung Galaxy S25 Ultra and S24 Ultra owners are struggling with severe battery drain, overheating, and slower charging speeds following the July 2026 security update. One S25 Ultra user reported daily battery usage jumping to 143% from 80% prior to the patch, while another saw their device drop from 85% to 5% in just two hours of screen time. Samsung has not publicly acknowledged the issue despite mounting complaints on Reddit and its community forums.

What users are experiencing

Galaxy S25 Ultra and S24 Ultra owners report three interconnected problems after installing the July update. Battery drain is the most severe: one user’s S25 Ultra lost roughly 5% to 7% per hour while sitting idle, draining 60% of the battery during deep sleep. Another S24 Ultra owner went from 85% to 5% in two hours of active use. Users also report devices running significantly hotter than normal and charging speeds slower than expected.

The firmware culprit and temporary workarounds

Galaxy S25 Ultra models with firmware version ending in CZG3 are linked to the issue, though S24 Ultra owners report identical problems. Some users have identified WhatsApp as a contributing factor, with one Reddit user discovering that a stuck backup process was causing overheating. Disabling WhatsApp’s end-to-end encrypted backups reduced the problem, though this workaround prevents users from restarting the backup feature. No official fix has been released as of July 30.

Samsung’s silence and user frustration

Users have submitted reports to Samsung through its community forums, but the company has not responded or acknowledged the widespread complaints. At $1,300 for a flagship device, owners expect faster support. Multiple tech outlets including Mashable and PCMag have reached out to Samsung for comment without receiving a response. The lack of communication has left affected users relying on community forums and trial-and-error solutions.

What this means for Samsung shareholders

This software failure arrives at a critical moment for Samsung’s premium phone lineup. The Galaxy S25 Ultra is a flagship device carrying Samsung’s reputation for quality. Widespread battery and thermal issues can damage brand loyalty and trigger warranty claims. If the problem persists without a rapid fix, it may also prompt regulatory scrutiny and potential class-action litigation from affected users in the U.S. and other markets.

Final Thoughts

Samsung faces mounting pressure to address the battery and overheating crisis affecting its flagship S25 and S24 Ultra models. With no official acknowledgment or timeline for a fix, users are left troubleshooting on their own. A rapid software patch is critical to prevent damage to Samsung’s brand and shareholder value.

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