Yes, the Garmin Forerunner 965 does have battery-saving features to extend its battery life:
Battery Saver Mode
The Forerunner 965 includes a Battery Saver Mode that can be enabled to conserve battery when needed. This mode reduces certain features and settings to extend the watch's runtime[1][3].
Adjustable Always-On Display
The always-on display feature, which keeps the screen on at all times, can be adjusted on the Forerunner 965. Turning off the always-on display or setting it to a shorter timeout helps save battery life. In always-on mode, Garmin claims up to 7 days of battery life[1][4].
Power Manager Settings
The Forerunner 965 allows users to customize power management settings to optimize battery life based on their usage. This includes adjusting GPS accuracy, disabling certain features, and selecting a battery saver mode[2][5].
By utilizing these battery-saving features, users can extend the Forerunner 965's impressive battery life of up to 23 days in smartwatch mode and 19 hours in GPS mode with multiband and always-on display enabled[1][4].
Citations:[1] https://www.trustedreviews.com/reviews/garmin-forerunner-965
[2] https://www.youtube.com/watch?v=31yBObT3rwo
[3] https://www.reddit.com/r/Garmin/comments/17zsjuu/how_to_disable_battery_saver_forerunner_965/
[4] https://synced.sg/blogs/smartwatches/garmin-venu-3-vs-forerunner-965
[5] https://www.youtube.com/watch?v=YcH46QiOavc