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On your Fenix 7 solar: what is the estimated battery life, in days, at 100% charge, and what settings do you use for that?

Cri6tian
over 2 years ago

I am interested in options, used by Fenix 7 solar owners, for maximizing their devices battery life. Try to benchmark my watch's settings. I am using a Fenix 7 sapphire solar, HR always on, pulse ox off, backlight 10% / timeout 8s, Bluetooth off, touch screen off; with these settings, at 100% battery, the watch displays 21 days battery life estimation.

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  • 0 over 2 years ago

    I get 14 days and an average drain of 12% every 24 hours (without any exercising).  My settings are same as yours except I have touch screen on, pulse ox on, backlight at 60%/8s timeout with gesture off.

  • 0 over 2 years ago

    With following setting on my F7SS I get approx. 5 weeks of battery life (~20% drain every 7 days).

    Includes 1 to 2 treadmill runs per week (~45 min per run). No GPS usage.

    I'm currently on 9.36 firmware

    Bluetooth off. Wifi off. No connection to phone at all

    Touch screen off. Gesture off. HR always on. Pulse ox off.

    4s backlight timeout. 20% brightness during day, 5% in sleep mode

    Stock watch face showing time, date, battery percent and steps

  • 0 over 2 years ago

    Fenix 7s SS v9.36 (12-14 days)

    • HR always on

    • Phone/WiFi turned on only for syncing ~x3/week.

    • Pulse OX: during sleep (+2 days if turned off)

    • Backlight: Off, 5% with button, 10% during activity

    • Timeout: 4s during general, sleep; 8s during activity

    • Touch screen: Only during Strength activities

    • Battery saver enabled

    • Gestures off

    • Watch face set to Low Power

    • Alarm set: 1

    • Wrist out the window when driving under sun.

    • Activitiy avg: 3 strength, 1 long skate (1.5h, GPS) everything using chest HRM.

    • Daily HRV Stress test with chest HRM.

  • 0 over 2 years ago

    7XSS: 28 days estimate with default settings.

    The actual battery life is about two weeks but I do a lot of activities with GPS, with multi-frequency GNSS turned on. 

    I don't think the backlight brightness or timeout affects the estimated battery life. It would affect the actual battery life, but not the estimate. 

  • 0 over 2 years ago in reply to silentvoyager
    silentvoyager said:
    I don't think the backlight brightness or timeout affects the estimated battery life. It would affect the actual battery life, but not the estimate. 

    Yes, it does. You can try it out for yourself.