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Body battery/stress broken on Instinct Solar? (My Venu is fine)

Hi. I've had a Venu for a while but a couple of months ago I purchased an Instinct Solar. I basically love it except "body battery" doesn't seem to work.

Problem description:

  • For months with the Venu I'd consistently (unless sick) wake up with a 70ish body battery. (yay)
  • For two months of wearing the Instinct Solar it would usually gain 0 or only a few points of body battery while I slept. If I look at the stress chart for the Instinct it shows basically constant stress while I'm sleeping, but if I look for the Venu it shows calmness.
  • I've tried rebooting the Instinct (and I gave it two months of time to learn my habits). No change.
  • I recently did an experiment of going back to the Venu for a week and the venu still looks great.
  • The heart rate logs for both watches seem approximately fine. I wear the watches just tight enough they don't jiggle on my wrists (good HR sensor contact).
  • They are both running the latest US firmware.

About the images:

Image 1 & 2: The most recent weekish shows a great venu body battery log, but the weeks prior on the Instinct were horrible. You can see the effect of me changing back to the Instinct mid-day on Sunday.

Image 3: This is the stress chart of my (subjectively pleasant) sleep last night with an Instinct. Basically solid stress.

Image 4: Here's my low stress Saturday. You can basically see where I switched to the Instinct about six PM.

Does anyone else see the same thing with your Instinct Solar? I'm trying to figure out how to possibly fix or if only my device is defective.

  • Body Battery stopped working on my brand new Garmin Instinct Solar today (maybe yesterday too) running the latest stable release v16.00. I have rebooted it a couple of times since updating.

    However it's kind of pointless anyway as the sleep tracking is so poor on this Garmin watch compared to competitors. 

    Still, not great, that's bug #2 seen so far. The first being the backlight being stuck on during an activity which sadly looks like it was reported a couple of years ago and still not fixed. 

    Battery life also doesn't seem to be amazing, goes down quite a few percent even without using the GPS so I don't see how it is going to last, we'll see. Perhaps related to this bug.

    In fact, after checking on Garmin connect it's also 5 on there (has been all day), although it tracked my sleep last night it did not recharge the body battery at all it seems?? First time I've seen that. I feel absolutely fine today and have been performing great in workouts etc when it says my battery level is only 5.

    I think Garmin need to invest a bit of time in the sleep tracking tech maybe...

  • Hi there, I am having the same issue i moved to instinct solar 2s and after venu, this one is completely wrong measuring body battery and stress, have you found any solution?thank you