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Realistic battery life, fenix 5?

Former Member
Former Member
Hello all,

So last week I bought a fenix 5. Store had it in open box and on the shelf but it was off, I was worried about it having been on for months on the shelf but they told me it had never been powered on, they only had the 5X on display powered up. Bought it, no discount got home and charged it. The battery was completely discharged.

One of my main reasons for buying the fenix 5 vs a 3 or another less expensive option was battery life - as I am starting to run ultra marathons.

Last Saturday ran my first. I started with 95% charge. GPS only mode (no Glonnass). I played occasionally with the watch during the race, and often moved it into view to see my HR (with backlight at 50%). Halfway into the race, 7 hours in, I notice it is at 40% battery. I changed it to Ultratrac in the activity settings menu, and start avoiding using the backlight or play with it(still glancing at it often to see HR).

My race time was 14 hours 30 minutes. When I made it across the finish line, literally 1 minute after, I glance at the watch to stop the activity and it powered down.

I know actual, realistic device times are often lower than what the manufacturer advertises. Still, advertised GPS mode at 20 hours and Ultratrac 60 hours, seems I should have gotten to the end of this race with a good battery reserve. I am planning longer races later in the season so... this watch might not cut it, apparently. My iphone 7 plus in airplane mode, but doing GPS tracking, went through all of this with 30% power left and me taking some pictures and listening to podcasts on the way.

So question to the group - is this the normal battery life I can expect from this device while tracking activities? Or did I get a dud or a battery affected by it being a showroom device?

Unsure if I am just being paranoid and need to enjoy the device and go Ultratrac from the start, turn off the backlight (not needed to be honest).

Thanks all,

Juan
  • Install Garmin Express on a PC, connect the watch to the PC and install the updates using Garmin Express.
  • Former Member
    0 Former Member over 6 years ago
    Ah thanks. Assumed it could all be done from the android app.
  • My first Fenix 5 bought around Black Friday from REI went back for a faulty altimeter. Second one I had for a few weeks. Tried every suggestion on the Garmin forum and from Garmin Support. Whether the watch was on or off, connected to bluetooth or not, the watch drained at a steady 1.4-2.0% per hour. Now, my third watch has lasted 5 days. The discharge rate seems to go faster after 50%. The battery widget says it was draining about 1% per hour for the past 24 hours. Nowhere close the the 14 days, but I guess if I can go 5 days I can live with it. I'm not sure how many times I can return watches to REI, but if this one doesn't pan out it's going back to Garmin
  • Disabling GPS also didn't work for me, so I'm interested to hear this could be a problem with v12? Anybody have these problems prior to v12?


    As fas as I know, the battery drain problem appear with the update to v11, neither on further upgrades got fixed, and even if you perform downgrades the problem do not get fixed.
  • As fas as I know, the battery drain problem appear with the update to v11, neither on further upgrades got fixed, and even if you perform downgrades the problem do not get fixed.


    If I remember correctly I also had the problem after installing V11. I can note remeber the watch to behave like this before 10.00, but I am not sure.
  • Former Member
    0 Former Member over 6 years ago
    Install Garmin Express on a PC, connect the watch to the PC and install the updates using Garmin Express.


    So I installed Garmin Express. That says my software is version 12, and in the watch menu it says version 8.20.00. Either way when I try to install the battery widget it says I need to update my device... Stumped!
    ???
  • Garmin Express uploads the update file on the watch and after that, it shows the new version.
    After disconnecting from PC the watch should show on the screen that there is an update and waits for confirmation by you to install it.
    Did you notice what was shown on the screen immediately after disconnecting from the PC?
  • Former Member
    0 Former Member over 6 years ago
    Doh. Sorted now. Even though in GE it says the watch is a version 12, it does not actually install it to the watch until you disconnect from GE. Here is hoping that v12 does not goose my battery.

    Thanks for the help!
  • Former Member
    0 Former Member over 6 years ago
    Experiences of a new replacement watch. It is a 54H. Arrived in the box 54% charged. Immediately updated to software v12.

    On receiving, I charged it to 100% using a battery pack that stops charging once the watch seems to be full. The watch started using battery at 0.7% per hour in watch mode.

    When the watch was down to 90% I charged it via the mains and left it on charge on past 100%. Now the watch is using battery at 0.2% per hour in watch mode.

    So promising signs.
  • If I remember correctly I also had the problem after installing V11. I can note remeber the watch to behave like this before 10.00, but I am not sure.


    At least mine happened the same, in v10 behave according to what garmin states about the battery duration, without any trouble, even in gps mode, very realible. Not like now since updated to v11 and later.

    Mine is 53* and I am waiting for replacement.