Samsung July Update Drains Galaxy S24/S25 Ultra Batteries by 5%-7% an Hour
Updated
Updated · Basic Tutorials · Jul 31
Samsung July Update Drains Galaxy S24/S25 Ultra Batteries by 5%-7% an Hour
3 articles · Updated · Basic Tutorials · Jul 31
Summary
Galaxy S24 Ultra and S25 Ultra users are reporting severe post-update problems, including standby battery loss of 5%-7% an hour, overheating and slower charging after Samsung’s July 2026 security patch.
A software bug appears to be keeping affected phones from entering sleep mode properly, leaving background activity running; one S25 Ultra reportedly fell from 85% to 5% overnight with only two hours of screen use.
WhatsApp’s encrypted backups are a leading community suspect because they may be getting stuck after the update, but that link remains unconfirmed and Samsung has not issued an official statement or fix.
Forum users say restarts and restricting power-hungry apps can offer temporary relief, while those who have not installed the patch face a trade-off between avoiding the bug and delaying security fixes.
Samsung has resolved similar Galaxy issues with follow-up updates before, so users are now watching for a near-term patch.