Battery drain

[segi_pn]

I am attaching my observations and measurements.
I have already completed two cycles from 100% charge to the next charge.

In the first cycle, there was an interesting break in consumption after the first recording of activity with the Suunto Smart HR Belt (I later bought a new chest strap).

In the second cycle, the exact opposite phenomenon occurred: after a sharp discharge, a change occurred and the discharge slowed down.

In addition to the soft reset, I removed the old paired HR belt at that time, as during one activity, the connection with the new HR belt did not start up.

I would like to add that before the last update (2.48.16), when using the watch a little more, I charged it after 10 days when the battery level was slightly above 30%.
Otherwise, I didn’t change my usage. I had continuous heat measurement, sleep tracking, smartphone notifications, brightness = medium, and Raise to wake = Low turned on.

[Horizontal_2]

I’m now down to a cycle without obsessive looking at the battery.
It’s been 10 days and I’m at 22%, I’ll do a run this morning and charge it.

Vertical 2 - titanium

• Normal daily use: 6% per day
• Maximum daily use: 12,5% per day
• Running without HRM: 2+% per hour
• Acitivity time: 6 hours (4 times of running)

I think it’s good. The first 48 hours I used the watch intensively using the flashlight a lot. I also wanted to measure an improvised hottub (which got to 40 degrees Celsius), so the screen was a lot of time on. In those 48 hours it lost about 25%. So that’s 15% extra (keeping in mind it should drain 5% per day).

The rest of the week I was using the ‘Simplicity Analog’ watch face and R2W - Fully activated. I do this since I like Analog watchfaces more, but I do dislike the AOD-versions of the analogs. Notifications are on, but only when I’ll be called.

I’m loosing like 6% per day without sports and not so intensive use. I think that’s what it supposed to be like.

In sportsmode it’s a bit different. Running 1 hour drains 2 %. The third percent mostly comes within an hour. So it drains a bit more than expected. IF I would ever do an 40h event I would bring my charger. Doesn’t really care if I use navigation or not at all. In januari/februari I’ll do a 2-day hike. That should make things more clear on this subject. I do not dare using the HR-strap again until the next update. I’m done with the whole resetting.

So the drain is OK for me. Still not really blown away. I was hoping to get easily over 14 days. I have to fight for that. Still it’s far above my user case. Next charge after today will be just before Christmas

[GuillaumeA]

On the Race 2 Titanium, I think the battery is excellent.

I charged it to 100% on 28/11/2025, and it reached 27% battery on 08/12/2025. During this time, I did around 20/22 hours of sport with GPS in performance mode. I also used the sleep tracking feature.

With the following settings:

Raise to wake - display only (on 75% of sports activities, 25% AOD)
Brightness: low
Notifications off
Airplane mode off
SPO2 off
HRV & sleep tracking on
HR24/7 on
With Suunto smart belt for 8/9 hours of exercise throughout the test period

I have not noticed any excessive battery drain on my part.

[gkaempfer]

Posting my experience here too. I continue to monitor in my next charging cycle. I have a feeling that the slight drainage increase that I experienced in the last day or so of the previous cycle continues but too early to tell for sure.

Here is my recent battery experience with my Vertical 2.

Over the past 14 days (and a bit) I managed to do 19.5 GPS+HR activities and drain 91% of my battery.

I built a simple prediction model for battery drainage rate assuming that there are three different drainage rates: During GPS+HR activity (running and cycling in my case), during sleep (DND) and while idle (with notifications and raise to wake variations). Under these assumptions I tried to approximate the drainage model as close as possible to the battery levels and activity times I recorded during the day and came up with the following numbers (they imply slightly less than 5% per day without activities and more than the spec 65 GPS hours):

Sleep tracking rate: 0.11%/h
Non activity rate: 0.25%/h
GPS Activity rate: 1.16%/h
Flashlight rate: 20%/h

The above model worked very well during most of the two weeks until the last day or so when the battery got to about 20%. From that point it seems to drain faster than my model allowed. In fact, until that point, the model showed about 1.07% drainage per GPS hour which I updated to the higher number above to compensate for the end.

Settings:

AOD OFF
Raise to wake: Display only
247 HRM
Notifications ON
No external BT connections except Android Suunto App (6.4.7)
Wireless OFF
BT discovery OFF
Brightness LOW
DND from 22:00-5:40
Sleep tracking on with HRM but without SPO2
NO USE OF FLASHLIGHT

[segi_pn]

I am attaching a graph from cycle 3.
Since the improvement in consumption in cycle 2, it appears that this trend is continuing and battery life is the same as before.
I conclude that this is due to the removal of the paired chest strap and then a soft reset (holding the top button for 10 seconds).

[sky-runner]

@Horizontal_2 said in Battery drain:

sportsmode it’s a bit different. Running 1 hour drains 2 %

Isn’t it supposed to last 65 hours, which should be less than 2% per hour, closer to 1.5%. Even my Race 1 uses less battery per hour. During a recent race It used 27% in 16 hours, and that is in the most accurate GPS mode.

[gkaempfer]

@sky-runner AOD, Navigation and I suspect BT to an external device (e.g. HRM) can increase battery drain. From my experience, without the above you can actually achieve better than 65 hours (on V2).

[sky-runner]

@gkaempfer My numbers were with navigation and Bluetooth, but without AOD. I think AOD would have a greater impact.

[gkaempfer]

Update on my battery consumption model:

Some of my GPS activities seem to consume relatively more battery than others. In particular, it seems that Mountain biking consumes more than running or bike commuting?

Vertical 2, firmware 2.48.16 ran from a full charge down to 7% in 12 full days with 28:45 hours (!!) of cumulative GPS activity (biking, running, mountain biking).

The corresponding model that was very close to this (and my previous charge cycle):

Sleep tracking with DND rate: 0.11%/h
Non activity rate: 0.24%/h
GPS Activity rate: 1.50%/h
Flashlight rate: 20%/h

Settings:

AOD OFF
Raise to wake: Display only
247 HRM
Notifications ON
No external BT connections except Android Suunto App (6.5.9)
Wireless OFF
BT discovery OFF
Brightness LOW
DND from 22:00-5:40
Sleep tracking on with HRM but without SPO2
NO USE OF FLASHLIGHT

[segi_pn]

I can provide a summary of battery consumption on Vertical 1 from the last cycle (the third cycle).

Mode	Consumption	Notes
Activity	20,492 %/day (0,854 %/h)	mainly GPS, HR/OHR, no maps
Day	6,794 %/day (0,283 %/h)	notification, OHR
Sleep	3,959 %/day (0,165 %/h)	DND, OHR