Reporting back. Took off the charger at 7am and back home at 8.30pm over 12 hours with heavy usage with navigation; 34%.
I have same problem few days ago. I uninstalled an app for black screen when charging and Wearable Widgets and now it is normal.
You really have to pay attention to the applications used.
You can have also problem with BT connexion if it is not fine. Try to unpair and pair again.
I have zero apps installed. Also, unpair and pair again doesn't help..
I take mine off charger at 8 am every morning, and by 8 pm its down to 55%... Most of the people are getting this type of better life
You got s defective unit or a watch app is draining the battery