Does the SPO2 Sensor Track all Day on Sense 2?

[DaughterofMaat]

It doesn't explicitly say that the SPO2 does track all day, but it does mention that using the feature will cause you to need to charge the device more frequently. So I'm assuming it tracks 24/7 but does anyone know for sure?

[N8teGee]

Hi @DaughterofMaat

I believe it's at night time just like tthe Sense 1.

[Dopovo]

Still the doubt is legit. In fact the wording used by Fitbit is very vague 

"Tracking SpO2 tells you how well blood oxygen is distributed in your body, which can help you understand potential changes in your wellness.
Not available in all markets. Not intended to diagnose or treat any medical condition or for any other medical purpose. Intended to help you manage your well-being and keep track of your information. Requires more frequent charging."

and does not spefically mention it as a sleep metric, contrarily to previous products. However I have a feeling that if it was continuous tracking (or, on demand) Fitbit would have, rightly, maybe a big deal out of it.

This entire preview campaign by Fitbit is very confused, littel details are provided, many questions are without answers, and, as usual by Fitbit, some functions are being quietly removed hoping the users do not notice. Seriously impressed (negatively unfortunately).

[kcordiano]

I would hope so, considering a lot of people voiced their opinions on the Feature Suggestion page when the Sense first came out.

[N8teGee]

I think it's best to assume it's at night time only unless a Moderator or Fitbit employee states otherwise. I agree that if it was all day, it would have been mentioned just like the all day stress monitoring was. 

[JohnnyRow]

Unless some breakthrough, I think just the measurement methodology requires being still;  might be possible on demand when sitting quietly, but doubt could be continuous all day.

[Guy_]

How does the battery hold up.

Is it 6 days with all features in use or like the sense 1, 6 days with no features being used?

Given the identical form factor it is probably the same battery capacity as the Sense 1.

Did anyone find a battery capacity mentioned for the Sense 2 and for the Sense 1, in order to compare?

[Dopovo]

I'm not so sure that the battery is the same actually. We noticed that declared battery life with GPS passed from 12 days to 5. Frankly speaking it's unlikely that Fitbit changed GPS sensor in order to increase accuracy (and then power consumption) so the battery might be actually smaller. Why such decision? I can't answer, there are already several strange choices made by Fitbit for this Sense 2

[Guy_]

It would seem odd to more than double the power needed for the GPS with the advancement of technology in 2 years,

Although the shape is the same it turns out the watch dimensions are slightly smaller it could be due to a smaller lighter battery and / or component shrinkage.

It could also be reason stuff has been removed to get a lesser use of the battery which also has a longer charge rate of 2 hours for a full charge whereas the Sense 1 can do it in far less.

[Dopovo]

Or simply put they might have cut the costs and replaced the component with lower quality.

[DanniVFnp]

Hey there Dopovo 😊

I wouldn’t mind hearing more about the features that are being quietly removed?

Which features are being removed from the new Sense 2?

Thanks for bringing this to our attention!

Danni girl 

[TheGG]

Yeah man I hate that same too with the music playback unsupported why and body temp so

[N8teGee]

Just to add a bit more to this thread after thinking for a bit. I think it's safe to say the device will not have all day spO2 tracking.

My reasoning is that we already know how much of a hit to battery life the night time tracking already has. So extending that to all day (and night), well you'd have a device where you'd be lucky for it to last one day between charges.

Even on the Garmin Fenix 7 which has the option of continuous spO2 tracking, the battery life is severely reduced from about 15-18 days to only a few days.

I think right now the most we can hope for is the ability to initiate a manual spO2 spot check.

[BRocket]

Using a Gamrin Venue 2 plus and using 24/7 pulse, spo2 and stress I get over 2 days. It boggles the mind why Fitbit can't let a customer decide.

[t.parker]

@N8teGee you kind of shattered the main selling point for Fitbit - long battery life. "only a few days" is what I currently get with my Sense when using it only when running/cycling and at night. No extra features, not using any other apps etc. My F6Pro charged last Sunday before my half-marathon right now shows 42% (after several hours of running and cycling including satnav which sets GPS precision to highest and eats battery even more). My Sense charged yesterday, now with one 1hr run (GPS) and one 40min indoor bike session shows 73% (I blame recent update as I can't remember battery being drained that quick 🤔). SpO2 indeed drains battery a lot quicker. I tried it on Garmin and the battery life on F6Pro reduced to 3-4 days (huge difference) and since those readings didn't bring anything useful to me I kept the feature disabled sincd. Nice to have but I think more important is whether Fitbit would allow spot checking. SpO2 requires sitting very still and looking at Garmin's all-day readings there are plenty of holes in data (no data points when watch wasn't able to take reading) because people move more during day.

[Rich_Laue]

As for SpO2 this feature which uses the Blue Led and Ultraviolet Led in addition to the Red Led for pulse, makes it a battery hog. 

As mentioned above, yes it requires to be somewhat stationary.