What One UI 8.5 Really Does to the Galaxy S25 Ultra Battery

A report on the Galaxy S25 Ultra under One UI 8.5 says battery life is still solid, but a bit lower overall.

In moderate use, the phone averaged about 7 hours 45 minutes of screen-on time.

Overnight idle drain rose slightly to around 7–8%, suggesting the update may affect standby efficiency.

Battery performance still varies a lot by use case, with streaming, gaming, and light daily tasks delivering different results.