I have been using my Garmin Venu 2 for almost one and a half year now. I really much like this watch and the battery duration is really good... in general.
Typically, it will only discharge between 10 and 15% per day, which would mean between 7 and 10 days between recharges.... but.
Every now and then, the battery power will be drained unexpectedly. If I'm lucky I notice during the day the charge drops from say 70 to 20%. Then I restart the watch and charge it again. Afterwards, discharge rate is back to normal. However, when the battery drops from 50% to 0 during the night, which happened a few times as well, it is less convenient as I also use the watch as alarm to wake up.
I already have the habit to charge the battery when it is around 50%, just to have some margin.
I would really love to hear whether there is a solution for these unexpected power drains, because that would tremendously increase my trust in this device.
BTW. Yes, I read other threads on the same topics, but unfortunately did not see any convincing answers. I already tried uninstalling all IQ apps etc. Even with the latest firmware (17.04) this still happens.