I’ve had my Forerunner 255 since April 2025. I bought it new with firmware version 19.18 and disabled automatic updates from day one. However, out of curiosity, I decided to update to the latest firmware (25.06) last week.
Immediately after the update, I noticed that the battery started draining faster. Fortunately, I’ve had a battery widget installed for a long time and know my usual battery consumption — it used to be around 0.3–0.34% per hour. Now it’s about 0.43% per hour at best.
You can check the attached picture for reference.
My usage patterns haven’t changed at all — I’m using the same watch face and features. The only thing that changed is the firmware.
While this isn’t as severe as some other cases I’ve read about, it’s still concerning. I previously had a Forerunner 55 that became almost unusable due to severe battery drain after an update, so I really hope this isn’t happening again.
Has anyone else experienced a similar issue or found a way to restore battery performance to what it was before the update?
