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Battery Drain During activity (also with no GPS)

Sergey_Kessel
over 7 years ago
Hi,

Got brand new 935. It lasted around 2 days on the first charge which was quite surprizing (I think most of my garmins had somewhat smaller battery life during first couple of charges, but definitely not 2 days).
First run, around an hour, 5% backlight, 56%->16% (in an hour!) and then shortly to 8%. Turned off backlight in the middle of activity.
Yes, I have glonass on, 1-sec recording, HRMRUN, running pod, but 920 lives a week with 5-7 hours of similar load.
Funny thing that I used the watch transmitting HR to my Edge for 1.5 hours - with no change in battery status (stayed at 8%), but then 5 mins with GPS killed the battery totally.

Then charged it to 100% (and left for an hour or two on the charger).
Morning: 98% left after the night (which is decent I believe, assuming HR monitoring every second).
45 minutes swim in Pool (no GPS!): 79% left (!). No backlight.

That is simply nonsence.
The funny thing is that I expected it not to last during smart-watch mode (assuming that 24/7 HR will drain), but it does not happen.
Instead, battery is drained during activity which is claimed to last 24 hrs (and I expected it to be comparable with 920).

FW is 6.0 (hey, Garmin, are you crazy turning auto-update FW by default?)

My thoughts
1. I run/ swim with no phone nearby - so maybe battery is drained by looking for phone (but I had no similar issues with 230/ 920 - no similar drain)
2. Device is very slow to sync for the first time - mayby 10 minutes or so. My thought was that maybe it drains when reading/ writing to memory)

Will try to hard reset the device (although wanted to avoid it and get the training status finally).

Any ideas - is that faulty device or is that something else?


Thanks in advance,
  • 0 over 7 years ago
    Hi Sergey, i had exact the same problem when i got my 935. I did an hard factory reset and that did fix things for me. I just did a recovery run in a low pace 5:45 a kilometers for 11 kilometers and that used 10% to give you an indication. Glasnos/gps and blue tooth on.

    Take care
    Mike
  • 0 over 7 years ago
    Hi Sergey, i had exact the same problem when i got my 935. I did an hard factory reset and that did fix things for me. I just did a recovery run in a low pace 5:45 a kilometers for 11 kilometers and that used 10% to give you an indication. Glasnos/gps and blue tooth on.

    Take care
    Mike

    Thanks for the feedback, tried hard reset couple of hours ago.
    It did not help at all - tested pool activity, 20%/ hour (no light).
    A person on a bike forum says his watch uses 1%/ 30 mins with light activated by wrist turn (light level 30%).

    PS: 10%/ hour is still high consumption (unless it is with light on), that makes 10hours in total I think - I assume something around 15 hours total is somewhat expectable (things like glonass/ 1-sec recording does not decrease battery by 50% I think).
  • 0 over 7 years ago
    Hard reset isn't the same as a factory reset (master reset). If your drain is too high, try a master reset. It wipes the device back to factory conditions so you have to reload everything but it might fix this.

    CW
  • 0 over 7 years ago

    I do not get the difference (hard reset is reset to factory conditions, deleting everything).
    i first deleted user data (power off, then turn on with lap key), then made factory reset (settings-> factory reset (cannot check right now - charging the watch)
    Did not help.
    Then in couple of hours I again did factory reset.

    Still massive battery drain in pool mode.
    Looks that running (with GPS!) drains a bit less
  • 0 over 7 years ago
    My understand is a hard reset is pressing and holding the light button for 15seconds. It doesn?t wipe user data. A master reset does. If it didn?t work then I?m out of suggestions.
  • 0 over 7 years ago
    Something not right here it would seem. Can you try an "at desk" swim with your phone paired to see what the battery drain is then. I am thinking would be good to eliminate phone pairing as a potential issue here.
  • 0 over 7 years ago
    If you have tried all the reset options and it is still draining that fast, your next step should be to call garmin support. It sounds to me like you just happened to get a defective watch, they are usually very good at sending a replacement out pretty quick.
  • 0 over 7 years ago
    Something not right here it would seem. Can you try an "at desk" swim with your phone paired to see what the battery drain is then. I am thinking would be good to eliminate phone pairing as a potential issue here.

    Was doing that recent days. Phone's not an issue, tried with it, with connection off via quick setting, tried on fresh watch without any phone connection set up.

    Will try beta 5.33, if it works.
  • 0 over 7 years ago
    If you have tried all the reset options and it is still draining that fast, your next step should be to call garmin support. It sounds to me like you just happened to get a defective watch, they are usually very good at sending a replacement out pretty quick.


    The last one to try - for me it means long time without a watch.
  • 0 over 7 years ago
    why does it mean a long time without a watch? Normally they will send you a new one and you can ship the old one back after you get the new one.