Fenix 6 - Battery lifetime

Hi at all,

I bought the new fenix 6 pro & Sapphire exactly a month ago and I noted a strange thing about the battery lifetime.

In the first day of my purchase, the fenix showed 12 days of battery lifetime, the secont time of re-charging it showed 11days of battery. In these last times always only 10days. :-( It's the fourth time that I re-charge my watch.

From the user's guide, Gamin write for my kind of watch 14 days of battery in smartwatch mode and heart rate monitoring. So, I expect to see at the end of the re-charge process, 14 days of battery.

Is it normal? Someone have the same situation? ... My fear is having a bad battery.

Thanks in advance for each answer.