Would it be possible to enable UltraTrac on the vivoactive 3?
Went for a Hike with my Wife over the weekend - her Fenix 3 in UltraTrac mode had no issues going all day, but I lost half our walk when the battery died on my new vivoactive. If the battery really did last the 13 hours claimed in the spec sheet (https://buy.garmin.com/en-GB/GB/p/571520#specs), I'd have no need for this, but it cut out a little over 4 hours in.
I love my new watch, and I have no interest/need for the Multi-sports and other features of the more "hardcore" watches, so I really want this to work for me. But if it can't record a day's activity it is going to have to go back.