My wife's Galaxy Watch has a problem with charging.
She puts it on the charging stand when going to bed e.g. at 30%. The watch charges to 100%, which it reached at maybe 3am. However, when waking up in the morning the watch (still in the charging stand) will only have 65%.
The watch will charge to 100%, but will not be maintained at that power.
I do the same with my Gear S3 and it will be at 100% every morning.
We tried to switch chargers, but the problem stays with the watch.
Galaxy Watch is running Tizen 4. Gear S3 is running Tizen 3.