It's common for new software to have bugs that materialize a few days after the release. That's why Samsung had to halt the One UI 7 rollout initially to address some bugs before resuming the release a couple of days later.

Several users have noticed higher battery drain on their devices after updating them to One UI 7. While that may appear to be a bug, that's likely not the case here, and nothing to worry about for now.

Many users have taken to online platforms like Reddit and even Samsung's own forums to complain that they're experiencing higher battery drain after updating their device to One UI 7. A Galaxy S23 owner posted on reddit that they were having to “charge multiple times a day” despite using the device for only reddit and YouTube. Similar concerns have also been expressed by some Galaxy S24 Ultra and Galaxy Z Fold 6 owners.

However, on many of these treads you'll find people with the same and other devices who say that they've felt no change in the battery drain after the One UI 7 update. Some even say that they feel battery life is slightly better than it was on One UI 6. This suggests that there's no widespread issue here that's causing the elevated drain rate.

So, what's the deal? You know how the battery life improved a week or so after you started using your brand new Galaxy device? The device optimizes battery efficiency based on your usage habits and other metrics. Major firmware updates typically reset all of the learning that's gone behind that personalized optimization.

How this materializes may differ for each user hence the variance in experiences that people are sharing. Those who are seeing higher drain should give it a week or so, things should settle down by then.