Samsung Galaxy users report slower charging after One UI 9.0 update

Some Samsung Galaxy users are reporting slower charging after the One UI 9.0 update. The issue is being discussed by users on Reddit, Weibo and other online platforms.

Some users say their Galaxy phones are no longer reaching the same charging speeds as before. Super Fast Charging may now use less power, which can make the phone take longer to charge fully.

The reports appear to involve the Galaxy S25 series and some older Galaxy models. Users claim that both the maximum charging power and charging speed have been reduced after the software update.

Some users believe Samsung may have changed the charging system to reduce heat and improve battery safety. This speculation comes after reports of battery-related fire incidents involving Galaxy S25+ phones.

Samsung Galaxy S24 Ultra (left) and S25 Ultra (right)

However, Samsung has not confirmed that the One UI 9.0 update was made to reduce charging speeds because of these incidents. The slower charging could also be caused by normal temperature controls, the charger, cable or battery settings.

For now, it is unclear whether this is a planned safety change or a software issue. More testing and an official explanation from Samsung will be needed to know the exact reason behind the reported charging slowdown.