High battery drain after fully charged

Have you done a soft restart? (hold in light button until the watch turns off completely, then start after say 15 secs). This sometimes helps to stabilise things.

Also consider the following IQ items for battery info:

Battery Graph App (presents various graphs of battery status from a glance widget) [Cheurch]

Battery Info Field (Records the battery situation during the activities to the .fit file) [Flipstone]

I already had some battery widgets. Installed some more (that I am familiar with from previous watches)

I think (kind of hope) that there is (probably even are) some bugs regarding what Garmin reports. I guess that there is some function or lookup table that is used to translate the battery voltage to percentage. And probably it's not linear, that's why it starts with a sudden percentage decrease but after a few days the voltage is still relatively hight and it still shows a high percentage (that is more or less the expected value)

I noticed now that some of the battery widgets report very different usage, estimated days left (2.4d) from what the Garmin widget (23d). They also still display a very high battery usage for the last hour (1.67%). On fenix6 I didn't notice this, so I assume that the widget is correct (no bug) and the numbers Garmin return in the CIQ api's are way off.

Hi flocsy🤠! 

Please look through Tips to Extend the Battery Life on a Garmin Fitness Watch. If you feel that your watch's battery is still draining faster than it should be, reach out to Garmin Product Support directly so they can take a further look into what could be causing the most drain with your specific device.

Garmin-Sierra all those tips are already in effect. I don't think the battery is draining faster than it should, but as I wrote in my previous comment it looks like there's a bug in the way Garmin calculate the percentage from the battery voltage that causes it to SEEM to be draining fast in the first couple of hours after being fully charged.

I thought just the opposite about my battery drain over a couple of charges... The drain was going absolutely fine, very linear, up to around 55-45%, but then, inexplicably, during a night or an afternoon without activities, the charge dropped by about 15% during sleep, with the watch even being in airplane mode... I saw this behavior only twice, and it occurred when my new FR965 had already been used for about a month and about three or four charges, but right now, with several more charges since then, the drain seems pretty linear. I'm actually quite satisfied with my 965 and I only hope that the planned upgrade arrives soon. Perhaps, at certain times, the watch is performing tasks in the background, perhaps related to maps, I don't know, that justify a sudden drop in charge, because apparently it has happened to some users when the battery is half charged, and to others being practically fully charged. I think you have to use the clock and continue watching its behavior: if it ALWAYS happens, you can think of some hardware (battery) failure (software failure would be strange, because it does not always happen in the same "charging zone" to all users); If, on the other hand, it does not occur on all charges, I suspect that it is some background task that the clock may be doing.

I am wearing my new watch now close to two weeks. The first time I charged it was basically on the pc to update it. The second time again on the pc to update to the current beta version.

yesterday night I charged it to 100%, went to bed right after and now after waking up it is at 60%. What is this? An Apple Watch? I don’t know what happened and I hope it really is just a display error or it will fix it over time, but is the 60 is correct I’definitely want a new watch…

I Had the same problem. Chargin last night on PC to 100% and at the morning i had 85%. AOD OFF, SPO2 OFF, all off! 

This Watch has so many Battery problems. I had so many Times Problems at battery drain at night. I even got a replacement watch. This problem still excist with the new one... Software is very bad optimised! 

Mine has just started doing similar. Fully charged says 51 days, a week later 45, fine, then a few days later of wearing but not using it's 18 days

Same here. I bought my forerunner 965 yesterday. I did a first run of one hour, I lost only 1% of battery.

 In the evening, I updated it on the PC (version 17.26) and charged it up to 100%. The watch indicated 23 days of autonomy. It ran down to 49% overnight and indicates 12 days of autonomy (no SPO2, sleep mode on and do not disturb mode on)!

since the last comment 2 months ago, has a solution been found?