@Stefan-T. I now can confirm this behavior. Today, after 13 days with some training and also HR broadcasting, I was down to 2% so I put it in the charging craddle. Some hour(s) ago I checked and the watch was on 100% and I put it on again. I could actually monitor, hot the percentage dropped and no I’m on 97%, which is about 1%/hour. That would give me some 4 days!!
I I’ll did the soft reset and was back on 99%.
So it’s definitely a software issue, that after charging some “counter” is running nuts
So I hope this is fixed in the next FW update…