Related
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Massive battery drain

2360511
over 4 years ago

After last two updates are watch almost useless. The battery level drops 4% every hour, so that means i have to charge the watch every day.

I don't use any smart functions, just wrist HR and activity tracking (sleep, steps...). During run is battery consumption cca 10% per hour (GPS 1sec recording, external HR),

which seem to be OK. So i presume that the battery is good. I tried factory reset, get back to previous SW version, but nothing helps. Now i'm on 5.7 so at least the watch doesn't freeze

after the end of a session. Do you have any tips, what else could i try?

  • 0 over 4 years ago

    From a full charge this morning, and one 55 minute run with music, I'm at 39% at 6pm.

    Installing the latest SW right now - hope that makes a difference.

  • 0 over 4 years ago

    I charged my 645M last friday before a trip... Monday I performed a 75 minutes run on a treadmill and the watch was with 40% so OK... Yesterday I fully charged again and made a 12km run in 55 min and the watch was with 40% so something is draining battery durring GPS activity.... And both runs without music or phone connection... another difference was that on GOS run I used my RDPOD and at the treadmill one i didnt use it

  • 0 over 4 years ago

    I just made a test... FR 645M with FW 5.90 using GPS with  GLONASS, clear sky, no buildings around, no headphone connected, no music, no smartphone... Ony FR 645M and RD-POD... Started with 100% and after 55 min run I am with 75% battery... There are something wrong with GPS activities due to a 75 min run on a threadmill used like 5%... Please Blake take a look at this massive battery drain or it won.t be possible to run more than 4-5h

  • 0 over 4 years ago in reply to DrGabrielSilva

    Have you let it go to 0? My last 10% lasted crazy long relaticr to the first 10% I used.

  • 0 over 4 years ago in reply to DrGabrielSilva

    On one hike i lost 40% during first 2 hours, then watch froze so i had to use reset. Then again they worked as usual so they took about 10% per hour.

  • 0 over 4 years ago

    Well just made another run with same conditions as described before... the only difference is that yesterday i used a structured workout and today i didnt... After 14.26km in 1:04:26 the battery drains from 91% to 69%... its TOO MUCH...

  • 0 over 4 years ago

    Today another test with new FW 6.20 and after 1h interval workout (from TrainingPeaks) with same conditions above i got 30% batery drain (87% to 57%j so Garmin need to check this battery drain or it wont be possible to make long distance runs... Tomorrow i will try without RDPOD to see if something changes...

  • 0 over 4 years ago

    I just experienced the same this morning. Came back from a 5k run and the watch went from 80% to 9% in about an hour. Looked like the watch was stuck in a WiFi sync loop and couldn’t be rebooted. Firmware 6.20. 

  • 0 over 4 years ago

    Today another test... Went for a Fartlek (55min - 11.83km and it was a Structured Workout from TrainingPeaks) and only with the FR 645M... No music, no headphone, no smartphone, no RD-POD, no HRM-Run... Only the watch and I.... After 55min the battery drops from 100% to 81% do it's draining too much battery on GPS activity...

  • 0 over 4 years ago

    Definitely seeing odd behaviour with 6.20 as well.

    When in watch mode the backlight seems to stay on forever unless you turn it off (no timeout)

    Also today after a run I had about 30% battery life, when I checked the time about an hour later he watch was completely drained and shut down.