Fenix 6 Pro battery drain overnight

hola, mi recomendación (aunque luego implica la pesada tarea de reconfigurar todas tus actividades) es hacer un hard reset; De esta forma, salvo fallo de hardware, se suelen solucionar todos los errores de instalación;
Yo tengo tu mismo reloj y despues de un hard reset mejoro mucho, pero sigue consumiendo (logicamente fallo de software)

Exactly the same.  Updated now battery drains overnight when it was previously very good.

Maybe check your Pulse Ox settings?

Pulse ox is off. No other change apart from the update and Stryd

Ok, sometimes updates seems to screw up settings which might need a Enable and then Disable afterwards. Like the settings is not used in a correct way. Maybe worth a try. 

Same problem after update to 24.10 version

For me, not even full factory reset remedies accelerated battery drain. Fortunately my battery is not emptying in a single day, but the drain rate continues to vastly exceed expectations - close to double what it should be.

I have nothing additional installed. Nothing paired except my phone. Pulse ox off. No activities started. GPS not initiated.

Drain overnight was 5% (on a 6X Pro Solar) with DND enabled, so no notifications, backlight or even button presses whilst I slept. Four hours since waking another 2% has been lost. It may well be 10% after 24 hours.

A 21 day smartwatch has been turned into a 10 day smartwatch. There is nothing but Garmin's firmware left to blame.

I totally agree with you, but there is something strange in your consumption, because I did a hard reset and at night it consumes approximately 2%, and on average daily it does not go from 7 to 10%
I only have the Bt to the phone and the heart rate activated
My watch is more or less a month old, perhaps the age of the battery is an important factor.
anyway, these latest firmwares eat up battery compared to the old ones

My watch is around 21 months old, but always charged thoughtfully in order to preserve long term battery performance. In the past it would drain 50% in a week including daily activities (dog walk with GPS) and indoor bike ride. Now it drains 50% per week, or more, with no activities recorded at all.

The decline in battery life has only been (increasingly) evident since alpha firmware 23.73.

forums.garmin.com/.../23-73---massive-battery-drain-again

I never advise master/factory reset.

My favourite one is the simple long push power off.

It helps sometimes, it doesn’t in other cases. But it is a fast process, so I apply it after each sw update and if I add or delete any ciq items.