What's your experience with battery life?

I am using the Vivomove Luxe for a week now. I appears that the watch can only survive one day in smartphone mode. So, Bluetoth on, HR on. But, wrist guesture off and Pulseoxymeter off.

THe Garmin site mentions that the wacht will survive 5 days maximum in smartphone mode. One day is very dissapointing to me.

I see some Vivomove Luxe users here, what's you experience?