Edge 840 Series - Recent Threads

RE: Battery level stuck at 100% for whole day SW 31.29

crispgarmin — Sun, 27 Sep 2026 17:12:56 GMT

No known release date, but I can confirm I tested it and fixed again in Beta 31.62 that came out last week. Better late than never!

Battery level stuck at 100% for whole day SW 31.29

AdKo — Mon, 25 May 2026 12:23:01 GMT

I'm using now SW 31.29 on my Edge 840

On Saturday, after charging to 100% a went for a long (whole day) ride. At some point in the middle of the day I realised that battery level gadget is stuck at 100% for whole day.

Starting, stopping, pausing activity, pushing device to sleep didn't help. It was still 100%.

Rebooting device helped. Battery indicator after reboot was showing 34% and was decreasing over next hours of device usage. It means that real battery charge was decreasing during the day, but indicator gadget was initially stuck at 100%.

RE: Battery level stuck at 100% for whole day SW 31.29

1162875 — Sun, 27 Sep 2026 14:17:54 GMT

I'm having the same issue since months. tapping the battery icon in the pull-down menu does not change it or show any other percentage. The only thing I can do is restart.

RE: Course Completed Message

Ian_Jackson_ — Thu, 24 Sep 2026 11:53:49 GMT

Hi, this is a different issue to trimming activities on Strava. This was a short ride to a race sign on which I did as a course to find my way there. I then did a 45 minute warm up as part of the same activity and then saved it just before the race. However it’s saved only the portion from the car to the sign on, losing the warm up. Would like to switch off this Garmin feature but didn’t know how or if it can be.

Course Completed Message

Ian_Jackson_ — Mon, 21 Sep 2026 19:17:20 GMT

After riding a course, when the stop/start button is pressed, a message is displayed saying course completed and it gives you the option to save only the course element of the activity and not the whole activity. I usually skip this however I mistakenly saved it and now I've 'lost' about 45 minutes activity which I did after the course was completed.

Is there away to recover it - so it's saved soewhere in a Fit File?

How can I turn off this feature so it doesn't happen again?

RE: Course Completed Message

Luko79 — Wed, 23 Sep 2026 17:01:52 GMT

yeah but you can do it on GC (or later on Strava or whenever you want). the main problem is the lack of undo option if you accidentally pressed the "trim to end of course ", it should be hidden (as a hidden lap or similar) but the data must be stored in the file for an undo option imho..

RE: Course Completed Message

Luko79 — Wed, 23 Sep 2026 16:59:30 GMT

navigation -> courses -> 3 dots on the top right corner -> suggested finish toggle button OFF

RE: Course Completed Message

druidh — Wed, 23 Sep 2026 16:19:09 GMT

Trim is often used by folk who leave the activity recording, jump in their car, and drive.

RE: Course Completed Message

Ian_Jackson_ — Wed, 23 Sep 2026 16:10:29 GMT

Ok thanks for looking at the file. Do you know how to switch off this feature?

RE: Course Completed Message

Luko79 — Wed, 23 Sep 2026 15:58:15 GMT

hi, yes . i got it, i have sad news, with this course endpoint trim thing the device deleted every records between the end of the course and the actual endpoint. so in your case only the 1st 45mins / 7.5km is in the file,

there is a command after 45m (started 07:33 by gnss time):

and i see that you rode another ~50mins apprx but there are no gnss /hr/pwr or any important data in the file. better to switch off completely this course trim feature, i think it causes more problem than it can help (honestly i dont understand why they implement in it... nobody needs it i think, at least without "undo" feature it is a harmful thing...)

RE: Course Completed Message

Ian_Jackson_ — Wed, 23 Sep 2026 12:29:49 GMT

Hi Fit file sent to you as a pm. Hopefully you can work it out. Thank you

RE: Course Completed Message

Luko79 — Wed, 23 Sep 2026 10:33:18 GMT

can you send me the file in pm? maybe i can fix it (or check what is in the original file exactly)

RE: Course Completed Message

Ian_Jackson_ — Tue, 22 Sep 2026 20:04:13 GMT

Hi, thanks for the response. I've deleted the activity from Garmin Connect and then manually uploaded it again. However it again only shows the activity to the end of the course. The odd things is that when you look at the FIT File you can see that it was ended about 45 minutes after the end of the course. I can't help thinking there's some 'hidden' data in there.

RE: Edge 840 Uploading Issues

Garmin - DK — Tue, 22 Sep 2026 14:59:19 GMT

Thanks for the post 8359463 . For the most immediate support, please contact our Product Support team here: https://support.garmin.com/

To troubleshoot what you're experiencing, please be sure to use this Support Center article: My Device Is Not Syncing Data to the Garmin Connect App

If you continue to experience erratic behavior with syncing, reply here with the following info:

Edge 840 software version:
Garmin Connect app version:
Phone model and OS version:
Error messages received (if any):

Edge 840 Uploading Issues

8359463 — Sun, 26 Jul 2026 16:16:46 GMT

This is becoming absolutely ridiculous.

After a few months with the Edge 840, I’m now regularly having problems uploading my rides. I previously had an Edge 830, and every ride would upload within seconds. With the 840, rides often don’t appear for hours, and sometimes even days.

I’ve tried all the usual fixes: manually syncing, restarting the device and phone, removing and re-pairing the Bluetooth connection, and every other workaround that Garmin Support regurgitates whenever users report these issues. None of them provide a permanent solution.

At this point, it’s simply not good enough. Garmin needs to stop relying on temporary solutions to cover his ass and properly address these long-standing sync issues. It feels as though the focus is on selling new devices rather than supporting the customers who have already invested in the ecosystem.

Can someone from the Garmin Support team explain how these issues can actually be resolved once and for all?

RE: Course Completed Message

Garmin - DK — Tue, 22 Sep 2026 14:41:32 GMT

You may be able to recover your activity data by doing a manual upload to Garmin Connect. More info here: How to Manually Upload Activities to Garmin Connect

RE: Edge 840: High Aerobic Training Load stuck at 0 points after recent update

9330834 — Tue, 22 Sep 2026 12:56:42 GMT

Google AI says this about LTHR and training efforts:

> Too high LTHR: Setting the threshold too high suppresses your training effect, making hard threshold or tempo intervals register as low aerobic because the watch thinks you are working at a much lower relative percentage of your capacity.

I tried lowering LTHR and immediately got High Aerobic load :) But of course Edge immediately increased LTHR back, so next activity was again classified as Low Aerobic.

So looks like the solution would be to find out LTHR in a lab and don't allow Garmin to change it :)

Edge 840: High Aerobic Training Load stuck at 0 points after recent update

2514252 — Wed, 05 Aug 2026 08:27:28 GMT

Since a recent update, my Edge 840 has completely stopped assigning High Aerobic points to my rides. Every activity—even hard interval sessions with sustained Zone 3/4/5 efforts—is categorized strictly as Low Aerobic, resulting in 0 High Aerobic Training Load points.

Key details:

Device: Garmin Edge 840 Firmware v31.33
Issue: High Aerobic Training Load = 0 across all rides (started a couple of weeks ago after an update).
Rides affected: All high-intensity rides / interval sessions.

Troubleshooting already completed (none of these fixed the issue):

User Profile & HR Zones: Checked Max HR, LTHR, and Power zones—all values are accurate and normal.
Auto-Detect: Turned OFF Auto-Detect Max HR and LTHR on the device.
Zone Method Reset: Toggled HR calculation methods (% Max HR to % LTHR and back) and forced a full sync.
Hardware Reboot: Hard restarted the Edge 840.
Data Check: HR and Power data graphs in Garmin Connect show normal, sustained high-intensity time in Zone 4/5 during workouts, but the Firstbeat load focus still yields 0 High Aerobic credit.

Any advice or official support tracking numbers would be appreciated!

RE: Edge 840 Uploading Issues

SomeGarminOwner — Mon, 21 Sep 2026 20:23:07 GMT

Thanks for taking the time to respond. I'm sorry to hear syncing is more broadly problematic than I originally thought, but I appreciate your adding the details here. Good luck with your training plan issue.

RE: Battery level stuck at 100% for whole day SW 31.29

JM 1361620 — Sun, 20 Sep 2026 16:51:40 GMT

From what I’ve been able to determine this issue has to do with the system not refreshing the battery status after it comes out of sleep mode. I’ve been riding the past couple of weeks and doing a complete power down after the ride, rather than let it go into sleep mode by itself or tapping the power button (same effect). Until they issue a corrective patch, the only way I know to determine your current battery remaining during a ride is to pull the drop screen down from the top, tap on the battery and it will show the number of estimated hours left.

RE: Edge 840 does not reconnect to Wifi after sleep

looigi — Sun, 20 Sep 2026 13:47:59 GMT

Yeah. IDK. My 840 worked fine for a couple of years, then quit uploading automatically when I finished a ride at home. It wouldn't use WIFI and I had to trigger a BT sync from the phone app. It would upload automatically via BT when finishing not at home if I had a cell data connection. I tried all the usual things but nothing worked reliably. Then, some months ago, it started working fine, including yesterday. Working, not working, then working again did not coincide with any updates as far as I was aware.

Edge 840 does not reconnect to Wifi after sleep

4588870 — Wed, 16 Sep 2026 01:26:16 GMT

As others have reported, my Garmin Edge 840 has stopped automatically reconnecting to WiFi. The previous threads have been locked with no fix reported, so I'll open a new discussion to report it again.

This problem seems to have occurred after the latest firmware update. It's annoying because in order to sync my activities I must wake the device up, find my phone and manually sync - if I forget to do it then my activities never show up in Garmin Connect / Strava.

A very temporary workaround is to delete my Wifi network on the device, or through the Garmin app on my phone and re-add it. This seems to work until the device goes to sleep, and then it never reconnected again. The only way to fix it again is to repeat the "delete and re-add the Wifi netowrk" step.

Turning the WiFi off and on again on device doesn't help.

Others report trying a dedicated 2.4 GHz guest network, but this didn't fix the issue for me.

RE: Edge 840 does not reconnect to Wifi after sleep

6501315 — Sun, 20 Sep 2026 13:04:13 GMT

Wifi used to somewhat work until a recent update.
I would programm the Wifi with Garmin Express and it would synchronize over Wifi unless the 840 was fully shutdown (not just put into standby).
Upon a full shutdown it would forget all Wifi and require reprogramming with Express.
Now the Wifi does not work at all anymore, Express rarely asks to program the Wifi credentials and then aborts during programing.

I actually bought the 840 in part for the Wifi, bit of a bummer.
But at least it synchronizes fine over USB.

RE: Edge 840 Uploading Issues

Dogbalou — Sat, 19 Sep 2026 14:02:44 GMT

I am used to the update glitch from having previous garmin devices, and that is the first thing I check. This isn't related to that. I recently experienced a problem with calendar not syncing at all in the last week of a training plan. When I deleted and restarted the next plan it was working fine.

RE: Edge 840 Uploading Issues

SomeGarminOwner — Sat, 19 Sep 2026 04:22:09 GMT

My 1040 exhibits the same behavior you describe with your 840. Like with your 830, my 1040 synced reliably for years. Sometime earlier this year it stopped syncing rides - sometimes taking hours/days, and sometimes not at all.

The cause appears to be pending updates. These updates never install over WiFi / Bluetooth, but with many cycles in Garmin Express of connecting > updating > disconnecting > repeating I can eventually get the updates to apply, after which time rides start syncing again. Things continue to sync normally, until another update gets stuck and I need to use Express to shake it loose again.

I'm disheartened to hear that this issue is more widespread than just the 1040 - to include at least the 840, per this post, as well as a family member's 1050. If you happen to find a real solution, would you mind posting a notice to this thread to let us 1040 owners know?

Thank you, and good luck.