Garmin Fenix 8 owners may still be dealing with unexpected battery drain, even after a recent software update aimed at improving power efficiency. The issue appears to affect battery runtime on some Garmin smartwatches, raising concerns among users who rely on the Fenix 8 series for long-lasting performance during workouts, travel, and daily wear.
Battery life has always been one of Garmin’s biggest strengths, especially compared with smartwatches such as the Apple Watch. Many users choose Garmin devices specifically because they can last for days or even weeks on a single charge, depending on the model and settings. That makes sudden battery drain especially frustrating when it appears after a firmware update.
Garmin recently released firmware version 22.39 for the Fenix 8 lineup, including the Fenix 8 AMOLED models. The update was intended to reduce excessive power consumption and bring battery performance back to expected levels. However, early user feedback suggests the problem may not be completely resolved for everyone.
At least one user has reported that the battery drain continued even after installing firmware version 22.39. While this does not yet appear to be a widespread confirmed issue, another user has pointed to a possible explanation involving Wi-Fi behavior.
According to that report, recent firmware versions may cause the smartwatch to keep Wi-Fi active after the device is removed from the charger, particularly after syncing Spotify playlists. Since Wi-Fi is one of the more power-hungry features on a smartwatch, an active connection running in the background could quickly reduce battery life.
If this behavior is confirmed, it could explain why some Garmin Fenix 8 watches are losing charge faster than expected. Music syncing, Wi-Fi connectivity, GPS tracking, pulse oximetry, and always-on display settings are all known to have a major impact on smartwatch battery performance.
This is not the first time Garmin users have noticed increased battery drain after a software update. In some cases, the problem has not been caused by a major software bug, but by settings being changed or re-enabled automatically during the update process.
One example involved firmware version 22.35, which reportedly turned continuous blood oxygen saturation monitoring back on. Pulse oximetry can be useful for health tracking, but when it runs continuously, it can significantly increase battery consumption. Users who did not realize the setting had been reactivated may have seen their battery life drop without understanding why.
For Garmin Fenix 8 owners currently experiencing battery drain, there are a few possible workarounds worth trying. First, check whether Wi-Fi remains active after charging or after syncing music. Turning Wi-Fi off manually when it is not needed may help reduce power usage.
It is also worth reviewing health tracking settings, especially continuous pulse oximetry. Disabling all-day blood oxygen monitoring can make a noticeable difference in battery life. Users should also check display settings, GPS mode, notifications, background sensors, and music sync behavior.
Another option is to restart the smartwatch after installing the firmware update. If the battery drain continues, a full factory reset may help, especially if the issue is caused by settings that were changed during the update process. However, users should back up or sync important data before resetting the device.
For now, it remains unclear how many Fenix 8 owners are affected by the latest battery drain reports. The issue may be limited to specific settings, certain usage patterns, or a small number of devices. Still, because battery life is such a key selling point for Garmin smartwatches, even isolated reports are likely to attract attention from users.
Garmin may release another firmware update if the company identifies a broader power consumption problem. Until then, Fenix 8 users experiencing reduced battery life should monitor Wi-Fi activity, review battery-heavy features, and consider resetting the watch if the issue persists.
